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Leaf injury Stock Photos and Images
RM2AWHTPC–Annual report of the Fruit Growers' Association of Ontario, 1904 . Fig. 44. Leaf-horn beetle. flies, Tachina flies, Syrphus flies (Fig. 50) and cheese flies. The Tachina andSyrphus flies are very beneficial. The Hemiptera or Bugs are divided into the True-bugs (Fig. 51), theLeaf-hoppers and Plant, lice (Fig. 52) and Lice. Nearly all are injurious,and frequently do much injury. They suck the juices from plants.. Fig. 45. Plant-eater beetle.
RMPG3YED–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 302 FUNGOUS DISEASES OF PLANTS encouraged by certain weakening influences, such as the age of the leaf, the presence of flea-beetle injuries, etc. When large spots near the margins of the leaves become confluent, such ex- tensive areas are affected that there may result a rolling up of the edge, which might be mistaken for the tip burn, a disease gener- ally due to climatic conditions. The injury from the early blight results, therefore, in an early death of the leaves, as a result
![. The Cultivator, Planet Jr." Single-Wheel Hoe Rake and Plow Combined. This tool is capable of doing nearly all kinds of fi&nd •garden work in a superior manner. We have added to it a detachable leaf guard to prevent injury to large or spreading plants, a strong and neat pair of rakes, and a pair of four-inch sweeps in place of the narrow cultivating teeth. Price, boxed, $6.00. Stock Photo](https://c8.alamy.com/comp/MCGWEH/the-cultivator-planet-jrquot-single-wheel-hoe-rake-and-plow-combined-this-tool-is-capable-of-doing-nearly-all-kinds-of-fiampnd-garden-work-in-a-superior-manner-we-have-added-to-it-a-detachable-leaf-guard-to-prevent-injury-to-large-or-spreading-plants-a-strong-and-neat-pair-of-rakes-and-a-pair-of-four-inch-sweeps-in-place-of-the-narrow-cultivating-teeth-price-boxed-600-MCGWEH.jpg ". The Cultivator, Planet Jr." Single-Wheel Hoe Rake and Plow Combined. This tool is capable of doing nearly all kinds of fi&nd •garden work in a superior manner. We have added to it a detachable leaf guard to prevent injury to large or spreading plants, a strong and neat pair of rakes, and a pair of four-inch sweeps in place of the narrow cultivating teeth. Price, boxed, $6.00. Stock Photo")
RMMCGWEH–. The Cultivator, Planet Jr." Single-Wheel Hoe Rake and Plow Combined. This tool is capable of doing nearly all kinds of fi&nd •garden work in a superior manner. We have added to it a detachable leaf guard to prevent injury to large or spreading plants, a strong and neat pair of rakes, and a pair of four-inch sweeps in place of the narrow cultivating teeth. Price, boxed, $6.00.
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RMTR67HN–sycamore maple, great maple (Acer pseudoplatanus), autumn leaves with tar spot desease, Germany
RF2WTRW1D–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
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RMT0D588–Economic entomology for the farmer Economic entomology for the farmer and fruit-grower economicentomolo01smit Year: 1906 384 AN ECONOMIC ENTOMOLOGY. Most of these parasites have the disadvantage of not influ- encing in the least the amount of injury done by the host; they simply prevent it from changing to an adult. It often happens that spinning caterpillars even complete their cocoon, and in this we find the mass of parasitic cocoons instead of the Lepidopter- ous pupa. On the other hand, some of them complete their Fig. 442. Apanteles species.—Little mass of cocoons on leaf, replacing a
RM2AWHW52–Annual report of the Fruit Growers' Association of Ontario, 1904 . Ficx. 43. Saw-horn beetle (Bup- restis).. Fig. 44. Leaf-horn beetle. flies, Tachina flies, Syrphus flies (Fig. 50) and cheese flies. The Tachina andSyrphus flies are very beneficial. The Hemiptera or Bugs are divided into the True-bugs (Fig. 51), theLeaf-hoppers and Plant, lice (Fig. 52) and Lice. Nearly all are injurious,and frequently do much injury. They suck the juices from plants.
RMPFY1B7–. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. 860 ENCYCLOPEDIA OF PRACTICAL HORTICULTURE. Fig. 2. Pickle Worm Injury to Cantaloup. Cocoons The cocoon is a thin, scanty covering of white silken threads, spun by the worm in a fold of some leaf before transform- ing to the pupal stage. They are general- ly found in dead or dying leaves near the ground, or lying on the soil under the in- fested
RMMCKB30–. Fig. 43. — Peach leaf-cui tkinson. popular name. This fungus destroys the utility of the leaf as a starch-producing organ, and eventually causes defolia- tion. This loss may be manifest in two ways: first, by the present effect upon the vitality and vigor of the tree, and immediate injury to the crop; second, by a weakening of the tree in succeeding years, due to the lack of full nourishment * The sub-genus Exoascus is by some regarded as of specific rank and the name as Exoascus deformans.
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RMEBN9C2–horse chestnut leafminer (Cameraria ohridella), damaged leaves on common horse chestnut, Germany
RF2WTRW00–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
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RMT1JJ3G–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 CYLINDROSPORIUM. 489 As yet the disease has been observed in quantity only in the neighbourhood of Oberammergau (Upper Bavaria). C. padi Kaist. Leaf-bh'glit of clierry and plum. This dis- ease is most destructive in the nursery, causing premature defoliation of young trees; it may also cause severe injury to fruit-bearing trees. The leaves become spotted and per
RM2AFRYPW–. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. ften attacks the seed. The worm may, under certain circumstances, make its attack at otherpoints than in the stem end of the fruit. Quite frequently when twopeaches are in contact on the tree, the worm bores its way into one ofthe fruits at this point of contact; or if a leaf or twig touches the fruithere also the Avorm may enter. The character of the injury is the samein any of these cases, and the fruit is ruined. 30 UNIVERSITY OF CALIFORNIA—EXPERIMENT STATION. PUPATION. Ea
RMPFY1B4–. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. Fig. 2. Pickle Worm Injury to Cantaloup. Cocoons The cocoon is a thin, scanty covering of white silken threads, spun by the worm in a fold of some leaf before transform- ing to the pupal stage. They are general- ly found in dead or dying leaves near the ground, or lying on the soil under the in- fested plants. For this reason the practice of raki
RMMCKYHR–. Fig. 62.—Mycosp/iaere/la sentina. i, pear leaf attacked b)' fungus, nat. size; 2, conidia of Septoria form ; 3, ascus and free spores of ascigerous form. 2 and 3 highly mag. proved by Klebahn to be the conidial condition of the asci- gerous fungus, Mycosphaerella sentina (Schroter). The injury is undoubtedly caused by the conidial form of the fungus, the ascigerous condition developing only on dead leaves that have been lying on the ground throughout the winter.
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RMEBN9C1–horse chestnut leafminer (Cameraria ohridella), damaged leaves of common horse chestnut, Germany
RF2WTRW1G–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
RMT0D0WE–Elementary biology; an introduction to Elementary biology; an introduction to the science of life elementarybiolog00grue Year: 1924 348 ELEMENTARY BIOLOGY new cells ; these die as they are moved toward the surface by the newer cells beneath, becoming a layer of dead scales. The skin protects the animals not only against mechanical injury but also against the loss of water and against the absorption of water, for the skin is practically waterproof, being Fig. 163. Mullein in pasture These plants are closely covered with fine, branching hairs, giving the leaf a flannellj texture. We can well
RM2AWR6CB–Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . ght becaused, but really this is not so, because in most cases they donot attack the b^hoots until the buds have become freed,—thatis to say, the shoots are attacked above the flower cluster, sothat no injury is done to the resulting crop. When the insectsdisappear, which they do quite early, the shoot simply sends outa new spur from the last leaf, and the effect of their presence isscarcely noticed. Practically, there is no method of checkingtheir increase, except by picking
RMPFN0EX–. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. KALE colored, often finely cut, leaves witli fleshy leaf-stems, which form part of the edihle portion. These leaf-stems are tough in the early autumn, but become crisp and pala- table with the accession of autumn frosts. The plant is ex- ceedingl V hardy; in the southern states it winters without injury and in
RMMAA9AW–. Economic entomology for the farmer and fruit-grower . making it difficult to pierce with any ordinary pin. It bores little holes in the leaf and flower stems of the plant, laying an 0.^^ in each, from which hatches in due time a white, grub-like larva, which feeds in the plant tissue. Where the leaves are regularly cut for market, little trouble is experi- enced. All old leaves not needed by the plant should be removed and destroyed, so that after midsummer none of the early leaves should re- main on the plants. If this practice is constantly carried out no injury need be apprehended. The na
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RMANWYGG–small-leaved lime, littleleaf linden, little-leaf linden (Tilia cordata), 300 years old single tree beside a chapel cutting dow
RF2WTRW49–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
RMT1JJ29–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 CYLINDROSPORIUM. 489 As yet the disease has beeu observed in quantity only in the neighbourhood of Oberammergau (Upper Bavaria). C. padi Karst. Leaf-blight of cherry and plum. This dis- ease is most destructive in the nursery, causing premature defoliation of young trees; it may also cause severe injury to fruit-bearing trees. The leaves become spotted and perforated by holes caused by the falling out
RM2AG2DKA–. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. e to diminish the risli ofinjuring the foliage. CoDijEUMS (Ceotons) : J. E. G. The injury iscaused by the accumulation of drops of wateron the leaves ; this afterwards becomes chilledand kills the tissue of the leaf. Moistureshould not be allowed to condense on thesurface of the leaf during the night. Peuit Faeming District : J. G. Such a districtas you describe will be found around Eveshamin Worcestershire. Bcok to Evesham RailwayStation. Gloxinias: Anrious. The corms are alive withthebiilh-mite. It
RMPG3TGE–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. CYLINDROSPORIUM. 489 As yet the disease has been observed in quantity only in the neighbourhood of Oberammergau (Upper Bavaria). C. padi Karst. Leaf-blight of cherry and plum. This dis- ease is most destructive in the nursery, causing premature defoliation of young trees; it may also cause severe injury to fruit-bearing trees. The leaves become spotted and perforated by holes caused by the falling out of withered sp
RMMA7JWA–. E. Fred Washburn's amateur cultivator's guide to the flower & kitchen garden for 1880 . HARDY ANNUALS. Vnese are so called because they do not require any artificial heat at any period of their gi-owth, and are capable of enduring any ordinary weather from April to November; a frosty morning, not unusual in the former month, or even in May, doing them no injury, if advanced beyond the seed-leaf. Many of them may be sown in Autumn; and the young plants will make their appearance early in sjDring, and flower stronger than when it is deferred till April. The Soil and its Preparatioiv.—The b
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RF2WTRW03–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 62.—Mycosp/iaere/la sentina. i, pear leaf attacked b)' fungus, nat. size; 2, conidia of Septoria form ; 3, ascus and free spores of ascigerous form. 2 and 3 highly mag. proved by Klebahn to be the conidial condition of the asci- gerous fungus, Mycosphaerella sentina (Schroter). The injury is undoubtedly caused by the conidial form of the fungus, the ascigerous condition developing only on dead leaves that have been lying on the ground throughout the winter. Stock Photo](https://c8.alamy.com/comp/T1HK61/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-fig-62mycospiaerela-sentina-i-pear-leaf-attacked-b-fungus-nat-size-2-conidia-of-septoria-form-3-ascus-and-free-spores-of-ascigerous-form-2-and-3-highly-mag-proved-by-klebahn-to-be-the-conidial-condition-of-the-asci-gerous-fungus-mycosphaerella-sentina-schroter-the-injury-is-undoubtedly-caused-by-the-conidial-form-of-the-fungus-the-ascigerous-condition-developing-only-on-dead-leaves-that-have-been-lying-on-the-ground-throughout-the-winter-T1HK61.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 62.—Mycosp/iaere/la sentina. i, pear leaf attacked b)' fungus, nat. size; 2, conidia of Septoria form ; 3, ascus and free spores of ascigerous form. 2 and 3 highly mag. proved by Klebahn to be the conidial condition of the asci- gerous fungus, Mycosphaerella sentina (Schroter). The injury is undoubtedly caused by the conidial form of the fungus, the ascigerous condition developing only on dead leaves that have been lying on the ground throughout the winter. Stock Photo")
RMT1HK61–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. 62.—Mycosp/iaere/la sentina. i, pear leaf attacked b)' fungus, nat. size; 2, conidia of Septoria form ; 3, ascus and free spores of ascigerous form. 2 and 3 highly mag. proved by Klebahn to be the conidial condition of the asci- gerous fungus, Mycosphaerella sentina (Schroter). The injury is undoubtedly caused by the conidial form of the fungus, the ascigerous condition developing only on dead leaves that have been lying on the ground throughout the winter.
RM2AWXR8J–Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . -hoppers are found ingrass lands, where they do much more injury than is generallysupposed,—an experiment in Iowa seeming to prove that justabout one-half the crop is destroyed in badly infested fields. Theexperiment was made by setting off two patches of equal size, asnearly equal in all respects as could be made, leaving the oneuntreated and collecting the leaf-hoppers from the other. Cattlewere pastured on both parcels, and that on which the insectswere collected supported
RMPG3NFA–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 47° FUNGOUS DISEASES OF PLANTS Having gained entrance through the stubble or plant canes the fungus invests the root system, and also the lower joints of the stem, cementing the leaf sheaths together near the base with a whitish mycelium. Not only is great injury done to the growing stools, but a vastly greater loss results from missing hills of cane, on account of the fact that the diseased stubble, or plant canes, may be so covered up by the fungus that few stalks will be produce
RMMCKC5M–. Fic. 126.— I, Phyllostula violac on violet leaf; 2, section of a perilhecium of J'/iy/losticta ; 3,' spores of same ; 4, spot on violet leaf formed by the fungus ; 5, Phoina susf>ecta, on gooseberry twig ; 6, peritheciiini of same in section ; 7, spores of same. near the tip, are exceedingly common ; in fact it is difficult to meet with a shoot of the season clear of these dots, which are the perithecia of Phoina suspecta (Mass.). This fungus is slightly, if at all, parasitic in its nature, and does no real injury, but is somewhat interesting as having been on many
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RF2WTRW4E–Pear weevil or pear blossom weevil (Anthonomus piri). A pest of pear trees that destroys buds. Pupa removed from the flower bud of pear tree.
RMT03JW4–Economic entomology for the farmer.. . economicentomolo00smit 0 Year: 1896 making it difficult to pierce with any ordinary pin. It bores little holes in the leaf and flower stems of the plant, laying an egg in each, from which hatches in due time a white, grub-like lar^^a, which feeds in the plant tissue. Where the leaves are regularly cut for market, little trouble is experi- enced. All old leaves not needed by the plant should be removed and destroyed, so that after midsummer none of the early leaves should re- main on the plants. If this practice is constantly carried out no injury need be
RM2AN05G2–The California fruits and how to grow them; . BLIGHTS AND DECAYS 581 winter use. It is sometimes a satisfactory curl-leaf preventive in theinterior valleys especially. Toadstool Destruction.—Trees are often destroyed through in-vasion by toadstool fungi from the decaying roots or wood withwhich their roots come in contact. The injury is often not detecteduntil the tree is ruined and it is too late for treatment. If only partisaffected, the disease may sometimes be arrested by cutting awaythe diseased parts and disinfection of the exposed tissue with theBordeaux Mixture. Moss, Lichens, etc., on
RMPFDW65–. Descriptive catalogue of vegetable, flower, and farm seeds : bulbs, roots, plants, tools. Vegetables Seeds Catalogs; Grasses Seeds Catalogs; Flowers Seeds Catalogs; Gardening Equipment and supplies Catalogs; Commercial catalogs New York (State) New York. EARLY WHITE STRAP LEAF TCKSIP. RUTA BAGAy or Swede Turnip. The Ruta Baga, Russian, or Swedish Turnip is extensively grown for table use ; the roots are close grained, very hard and will endure a con^ siderable degree of cold without injury. The roots are best preserved in a pit or cellar during winter, and are excellent for the table early i
RMMAAA10–. Economic entomology for the farmer.. . making it difficult to pierce with any ordinary pin. It bores little holes in the leaf and flower stems of the plant, laying an egg in each, from which hatches in due time a white, grub-like lar^^a, which feeds in the plant tissue. Where the leaves are regularly cut for market, little trouble is experi- enced. All old leaves not needed by the plant should be removed and destroyed, so that after midsummer none of the early leaves should re- main on the plants. If this practice is constantly carried out no injury need be apprehended. The natural food-plan
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RMEBK4TY–Green dock beetle, Green dock leaf beetle, Green sorrel beetle (Gastrophysa viridula, Gastroidea viridula), damage of leaves of Rheum palmatum, Germany
RF2M5710A–Net blotch of barley - fungal disease on barley. Can cause yield losses from 10% to 40% with a reduction in thousand grain weight. Causes by Pyrenopho
![Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] 128 BOTANY tend to droop or fold after a much shorter exposure to the dark ness. These changes in position have been called sleep move- ments. Charles Darwin suggested that the leaves of a plant which take this position secure protection from injury by frost. In most cases the movement may be accounted for when we remem- ber that leaf blades naturally turn their upper surfaces toward the light. In the absence of light the leaf blade Stock Photo](https://c8.alamy.com/comp/RWPFFK/elements-of-biology-a-practical-elements-of-biology-a-practical-text-book-correlating-botany-zoology-and-human-physiology-elementsofbiolog00hunt-year-c1907-128-botany-tend-to-droop-or-fold-after-a-much-shorter-exposure-to-the-dark-ness-these-changes-in-position-have-been-called-sleep-move-ments-charles-darwin-suggested-that-the-leaves-of-a-plant-which-take-this-position-secure-protection-from-injury-by-frost-in-most-cases-the-movement-may-be-accounted-for-when-we-remem-ber-that-leaf-blades-naturally-turn-their-upper-surfaces-toward-the-light-in-the-absence-of-light-the-leaf-blade-RWPFFK.jpg "Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] 128 BOTANY tend to droop or fold after a much shorter exposure to the dark ness. These changes in position have been called sleep move- ments. Charles Darwin suggested that the leaves of a plant which take this position secure protection from injury by frost. In most cases the movement may be accounted for when we remem- ber that leaf blades naturally turn their upper surfaces toward the light. In the absence of light the leaf blade Stock Photo")
RMRWPFFK–Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] 128 BOTANY tend to droop or fold after a much shorter exposure to the dark ness. These changes in position have been called sleep move- ments. Charles Darwin suggested that the leaves of a plant which take this position secure protection from injury by frost. In most cases the movement may be accounted for when we remem- ber that leaf blades naturally turn their upper surfaces toward the light. In the absence of light the leaf blade
RM2AWP8EG–Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . 384 AN ECONOMIC ENTOMOLOGY. Most of these parasites have the disadvantage of not influ-encing in the least the amount of injury done by the host ; theysimply prevent it from changing to an adult. It often happensthat spinning caterpillars even complete their cocoon, and in thiswe find the mass of parasitic cocoons instead of the Lepidopter-ous pupa. On the other hand, some of them complete their Fig. 442.. Apanleles species.—Little mass of cocoons on leaf, replacing an infest
RMPG14TB–. Manual of tree diseases . Trees. BUCKEYE DISEASES 119 defoliation results in retanHnc; tlic growth of the trees and making tliem more susceptible to winter-injury. Si/mptoms. The lesions develop on the leaflets and petiole. AMien first evident, the spots are irregular in outline, slightly dis- colored and water-soaked in appearance. Later the center of the spot becomes red- dish brown and is sur- rounded by a yellowish zone which blends into the green of the healthy part of the leaf. Finally, the entire affected area turns brown and becomes dried and brittle (Fig. 14). The spots may be small
RMMCKB04–. considerable damage, causing premature falling of leaves. The rust appears as brown spots upon the leaf. Leaf-blight {Cercospora bol- leana (Thiim.) Speg.). —This blight has been noted in the United States, though but slight attention has been given it. It causes injury similar to that of Fig. 76. — Fig in well-advanced rust, of fruit-rot. Original. Other diseases of the fig are: a Rhizoctonia leaf-blight; a root-knot due to nematodes; Southern-blight (Sclerotium rolfsii); Cankers due to Mac- rophoma, Libertella, and Tubercularia; Limb-blight due to Corticium; Root-rot (Ozonium) and Yellow-r
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RMEBK5C2–Green dock beetle, Green dock leaf beetle, Green sorrel beetle (Gastrophysa viridula, Gastroidea viridula), pregnant female, damage of leaves of Rheum palmatum, Germany
RMT1H2H0–Diseases of economic plants (1921) Diseases of economic plants diseasesofeconom01stev Year: 1921 Cereals 293 but it is hardly probable that this disease will extend seriously or become very destructive, except locally, and in very humid, hot seasons. In some cases, the injury is as high as 6 to 10 per cent of the crop. The fungus grows in leaf, sheath, and stem, rarely in the husks. Bleached or yellow spots about 1 mm. in diameter first appear, and within a few days darken, eventually becoming reddish-brown. Coales- FiG. 154. — Map showing the distribution of Physo- derma zea3-maydis in t
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