Diseases ash leaf Stock Photos and Images

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Diseases ash leaf Stock Photos and Images

Ash dieback disease signs in ash trees (Fraxinus excelsior), caused by Hymenoscyphus fraxineus, an ascomycete fungus, UK Stock Photo

RM2JW3HKY–Ash dieback disease signs in ash trees (Fraxinus excelsior), caused by Hymenoscyphus fraxineus, an ascomycete fungus, UK

Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by Stock Photo

RMCM95PD–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by

Ash Fraxinus excelsior leaves with Leaflet Roll Gall caused by the Plant Louse Psyllopsis fraxini. Stock Photo

RMDAAJGB–Ash Fraxinus excelsior leaves with Leaflet Roll Gall caused by the Plant Louse Psyllopsis fraxini.

Canadian ash-leaved maple blooms abundantly filling the air with allergenic pollen and causing allergic diseases - hay fever and rhinoconjunctivitis, Stock Photo

RF2HFBM64–Canadian ash-leaved maple blooms abundantly filling the air with allergenic pollen and causing allergic diseases - hay fever and rhinoconjunctivitis,

RFTW1JRC–Ash Dieback disease

Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree. Stock Photo

RF2R9KABP–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

Ash trees with Ash Dieback disease on a sunny day Stock Photo

RF2A5MFAE–Ash trees with Ash Dieback disease on a sunny day

Hand holding a cigarette. Unlighted cigarette holden between two fingers. Stock Photo

RFPWEMXH–Hand holding a cigarette. Unlighted cigarette holden between two fingers.

An Abstract, based on tree bark patterns Stock Photo

RF2CBW6F5–An Abstract, based on tree bark patterns

Annual report of the Maine Agricultural Experiment Station . Fig. 56. Nymphs of the Woolly Aphid, Schisoneura lanigera onwater shoot of mountain ash, Pyrns amcricaiia,—the immediate progenyof migrants from elm leaf rosette. Photographed at Orono, June 28,1912. Enlarged.. Fig. 57. Young rosette photographed June 6, [913. Small pictureat right. Fig. 58. Old rosette photographed July 17, 1013. Work ofWoolly Aphid of apple on elm leaves. See page 14. [531-12-16] fflnibn&ity of JWaine. MAINE AGRICULTURAL EXPERIMENT STATION ORONO, MAINE. CHASj D. WOODS, Director. POTATO GROWING AND POTATO DISEASES F Stock Photo

RM2AN8EHH–Annual report of the Maine Agricultural Experiment Station . Fig. 56. Nymphs of the Woolly Aphid, Schisoneura lanigera onwater shoot of mountain ash, Pyrns amcricaiia,—the immediate progenyof migrants from elm leaf rosette. Photographed at Orono, June 28,1912. Enlarged.. Fig. 57. Young rosette photographed June 6, [913. Small pictureat right. Fig. 58. Old rosette photographed July 17, 1013. Work ofWoolly Aphid of apple on elm leaves. See page 14. [531-12-16] fflnibn&ity of JWaine. MAINE AGRICULTURAL EXPERIMENT STATION ORONO, MAINE. CHASj D. WOODS, Director. POTATO GROWING AND POTATO DISEASES F

Common Ash (Fraxinus excelsior) dieback of leaves, caused by Ash Dieback (Chalara fraxinea) fungal disease, Norfolk, England, June Stock Photo

RME9PB50–Common Ash (Fraxinus excelsior) dieback of leaves, caused by Ash Dieback (Chalara fraxinea) fungal disease, Norfolk, England, June

bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood Stock Photo

RMD05M9X–bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood

. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 334 GENERAL PLANT PATHOLOGY Crateria.—C. Schimper uses this term for a leaf blade which de- velops ascidia, as the ascidial white ash discovered by George H. Shull. Cyclochoiisis (Fermond).—Division of an axial organ in two direc- tions, so that in place of a simple axis there arise whole clusters of secondary axes. Dedoublement (chorisis, doubling).—Congenital division of an organ in which several parts arise out of a single primordium. Lateral and serial dedoublement are distinguishab Stock Photo

RMPG44MR–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 334 GENERAL PLANT PATHOLOGY Crateria.—C. Schimper uses this term for a leaf blade which de- velops ascidia, as the ascidial white ash discovered by George H. Shull. Cyclochoiisis (Fermond).—Division of an axial organ in two direc- tions, so that in place of a simple axis there arise whole clusters of secondary axes. Dedoublement (chorisis, doubling).—Congenital division of an organ in which several parts arise out of a single primordium. Lateral and serial dedoublement are distinguishab

RM2JW3HKH–Ash dieback disease signs in ash trees (Fraxinus excelsior), caused by Hymenoscyphus fraxineus, an ascomycete fungus, UK

RMCM95PT–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by

RF2R9KAAK–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

RFPWEMX0–Hand holding a cigarette. Unlighted cigarette holden between two fingers.

RF2CBW6G3–An Abstract, based on tree bark patterns

. The trees of America [microform] : native and foreign, pictorially and botanically delineated and scientifically and popularly described, being considered principally with reference to their geography and history, soil and situation, propagation and culture, accidents and diseases .... Trees; Arbres. â 'nia. i'in. for the manna ash, (amen-tube 10- 'â¢"ed on a short 'ff off from the 'It'd. Embryo leaves. Leaf- i^es of Per- (Icciduous 'h eligible lica, or for lern parts I'e, besides is said to ^pan, and 'â¢ A tree en Mclia, to grow as only a Melia azedarach, THE PRIDE OF CHINA. Synonymes. Stock Photo

RMREPG7M–. The trees of America [microform] : native and foreign, pictorially and botanically delineated and scientifically and popularly described, being considered principally with reference to their geography and history, soil and situation, propagation and culture, accidents and diseases .... Trees; Arbres. â 'nia. i'in. for the manna ash, (amen-tube 10- 'â¢"ed on a short 'ff off from the 'It'd. Embryo leaves. Leaf- i^es of Per- (Icciduous 'h eligible lica, or for lern parts I'e, besides is said to ^pan, and 'â¢ A tree en Mclia, to grow as only a Melia azedarach, THE PRIDE OF CHINA. Synonymes.

RMD05M5K–bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood

. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 351.—Actinonema rosae. 3, branching strand of superficial mycelium; 4, spores. After Southworth. A. manihotes Hen. on cassava in Africa. A. tremulae Sacc. occurs on aspen; A. melutispora B. & Br. on ash. Actinonema Fries (p. 505) Pyenidia very small, not ostiolate, with a radiating mycelial growth on the surface of the host; conidia elongate, on short conidiophores. A genus of about fifteen species, chiefly leaf parasites. A. rosse (Lib.) Fr.^'*- "« Spots rounded or irregular, black or purple, epiphyllous, often. Plea Stock Photo

RMPG45RA–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 351.—Actinonema rosae. 3, branching strand of superficial mycelium; 4, spores. After Southworth. A. manihotes Hen. on cassava in Africa. A. tremulae Sacc. occurs on aspen; A. melutispora B. & Br. on ash. Actinonema Fries (p. 505) Pyenidia very small, not ostiolate, with a radiating mycelial growth on the surface of the host; conidia elongate, on short conidiophores. A genus of about fifteen species, chiefly leaf parasites. A. rosse (Lib.) Fr.^'*- "« Spots rounded or irregular, black or purple, epiphyllous, often. Plea

RM2JW3HHM–Ash dieback disease signs in ash trees (Fraxinus excelsior), caused by Hymenoscyphus fraxineus, an ascomycete fungus, UK

RMCM95PF–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by

RF2R9KAB3–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

Cigarette on loose shredded tobacco, close up. Stock Photo

RFPWEN21–Cigarette on loose shredded tobacco, close up.

RMRDE20A–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 334 GENERAL PLANT PATHOLOGY Crateria.—C. Schimper uses this term for a leaf blade which de- velops ascidia, as the ascidial white ash discovered by George H. Shull. Cyclochoiisis (Fermond).—Division of an axial organ in two direc- tions, so that in place of a simple axis there arise whole clusters of secondary axes. Dedoublement (chorisis, doubling).—Congenital division of an organ in which several parts arise out of a single primordium. Lateral and serial dedoublement are distinguishab

RMD05MBM–bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood

RMCM95PJ–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by

RF2R9KAD3–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

Native southeast asia cigarette and shredded tobacco. Stock Photo

RFPWEN1H–Native southeast asia cigarette and shredded tobacco.

RMRDE5AP–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 351.—Actinonema rosae. 3, branching strand of superficial mycelium; 4, spores. After Southworth. A. manihotes Hen. on cassava in Africa. A. tremulae Sacc. occurs on aspen; A. melutispora B. & Br. on ash. Actinonema Fries (p. 505) Pyenidia very small, not ostiolate, with a radiating mycelial growth on the surface of the host; conidia elongate, on short conidiophores. A genus of about fifteen species, chiefly leaf parasites. A. rosse (Lib.) Fr.^'*- "« Spots rounded or irregular, black or purple, epiphyllous, often. Plea

RMD05M4Y–bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood

The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree. Stock Photo

RMCM95W3–The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RF2R9KABF–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

Hand holding a Native southeast asia cigarette. Stock Photo

RFPWEMYJ–Hand holding a Native southeast asia cigarette.

. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. AGE (Days after emergence) A(3E (Days after emergence). 5 10 15 20 25 30 35 16 22 28 Temperature (C) Temperature (C) Figure 3.—Effect of treatments and experimental conditions on size of lesions on green ash leaf discs inoculated with G.fraxini. A. Effect of t>pe of wounding. Means of three experiments. Treatments were NW = Nonwounded with a 10 jjl droplet of sterile distilled water, NI = Nonwounded, inoculated with G.fraxini, CH = Stock Photo

RMRFCBC7–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. AGE (Days after emergence) A(3E (Days after emergence). 5 10 15 20 25 30 35 16 22 28 Temperature (C) Temperature (C) Figure 3.—Effect of treatments and experimental conditions on size of lesions on green ash leaf discs inoculated with G.fraxini. A. Effect of t>pe of wounding. Means of three experiments. Treatments were NW = Nonwounded with a 10 jjl droplet of sterile distilled water, NI = Nonwounded, inoculated with G.fraxini, CH =

RMD05MAR–bracket fungus on mature European Common beech at ground level on trunk ultimately leading to rot death on old wood

RMCM95W9–The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RF2R9KABA–Prociphilus bumeliae. A colony of hairy, wax-covered aphid secretions on an ash tree.

RFPWEMX7–Hand holding a cigarette. Unlighted cigarette holden between two fingers.

RMRF3RXE–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. Figure 1.—In vitro technioque used to study infection of green ash by Gnomoniella fraxini. A. Plastic petri dish (100 mm diam.) containing 2% water agar (4 mm deep) with wells cut using a sterile cork borer (18 mm diam.) and leaf discs of corresponding size being placed into wells with a sterile forceps. B. Arrangement of ash leaf discs in wells in water agar. Arrow indicates 4 mm diam. aluminum rod the tip of which was heated and tou

RMCM95W2–The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEMXP–Hand holding a cigarette. Unlighted cigarette holden between two fingers.

RMRFCBDT–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. Figure 1.—In vitro technioque used to study infection of green ash by Gnomoniella fraxini. A. Plastic petri dish (100 mm diam.) containing 2% water agar (4 mm deep) with wells cut using a sterile cork borer (18 mm diam.) and leaf discs of corresponding size being placed into wells with a sterile forceps. B. Arrangement of ash leaf discs in wells in water agar. Arrow indicates 4 mm diam. aluminum rod the tip of which was heated and tou

RMCM95TY–The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEN1R–Native southeast asia cigarette and shredded tobacco.

RMRF3RW4–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. AGE (Days after emergence) A(3E (Days after emergence). 5 10 15 20 25 30 35 16 22 28 Temperature (C) Temperature (C) Figure 3.—Effect of treatments and experimental conditions on size of lesions on green ash leaf discs inoculated with G.fraxini. A. Effect of t>pe of wounding. Means of three experiments. Treatments were NW = Nonwounded with a 10 jjl droplet of sterile distilled water, NI = Nonwounded, inoculated with G.fraxini, CH =

RMCM95W6–The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEN0N–Native southeast asia cigarette and shredded tobacco.

RMRFCBCJ–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. 1 5 9 13 17 21 25 29 TIME AFTER APPEARANCE (DAYS) Figure 2.—A-G. Leaf development of six green ash seedlings grown in the greenhouse. A-F. Size (leaf length) of individual leaves at up to 10 nodes. Length of one leaf per node measured from axillary leaf bud to tip of terminal leaflet. Leaves numbered in order of appearance from bottom to top of shoot. Growth curves of individual leaves based on a greenhouse grown green ash seedling tr

Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree. Stock Photo

RMCM95PH–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEN08–Hand holding a Native southeast asia cigarette.

RMRF3RWH–. Recent research on foliage diseases : conference proceedings : Carlisle, Pennsylvania, May 29-June 2, 1989. Leaves Diseases and pests United States Congresses. 1 5 9 13 17 21 25 29 TIME AFTER APPEARANCE (DAYS) Figure 2.—A-G. Leaf development of six green ash seedlings grown in the greenhouse. A-F. Size (leaf length) of individual leaves at up to 10 nodes. Length of one leaf per node measured from axillary leaf bud to tip of terminal leaflet. Leaves numbered in order of appearance from bottom to top of shoot. Growth curves of individual leaves based on a greenhouse grown green ash seedling tr

RMCM95R1–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEMYY–Hand holding a Native southeast asia cigarette.

RMCM95R5–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.

RFPWEMWM–Cigarette on loose shredded tobacco, close up.

RMCM95PX–Suffolk, UK. 31st October 2012. The general public has been asked to report suspected cases of ash dieback diseases caused by the chalera fraxinea fungus. The symptoms include wilting leaves and brown dying leaves. This picture taken on 31 October 2012 in Suffolk, where there have been confirmed cases of ash dieback, illustrates the difficulty distinguishing with an untrained eye between natural autumnal changes and what might be a diseased tree.