leaf yellowing

Listing 11 - 20 from 186 for leaf yellowing

Trees part 2
... spp. Black Leaf Spot (fungus - Gnomonia ulmea): Small, yellow spots appear first on upper surface of leaves, then gradually develop a shiny black appearance. Heavy spotting causes leaf yellowing and early defoliation in wet seasons. Usually defoliation does not occur much before normal leaf fall so control is not warranted. If ...
plantpathology.tamu.edu

FPHG -
... mid-March to early April, after the danger of freezing is past but before much leaf yellowing occurs. Straw should be left in the rows as a bed for the berries to ...
ssfruit.cas.psu.edu

CELASTRUS INSECT PROBLEMS
... Plants plus Version 3.0 - 00000312 11/12/99 CELASTRUS INSECT PROBLEMS Euonymus scale causes leaf yellowing followed by plant death. The insects are not readily seen and so can build up ...
web1.msue.msu.edu

Diseases of Lentil (Lens culinaris Medik.)
... rolfsii (Curzi) Tu & Kimbrough = Corticium rolfsii Curzi) Cucumber mosaic Cucumber mosaic virus Cylindrosporium leaf spot and stem canker Cylindrosporium sp. Dodder Cuscuta hyalina Roth. Downy ... leaf spot Helminthosporium sp. Leaf rot Choanephora sp. Leaf yellowing Cladosporium herbarum (Pers.) Link Lentil yellows Bean (pea) leaf roll virus Beet Western yellows virus Subterranean clover red leaf ...
www.apsnet.org

New Disease Reports - Volume 5: February 2002 - July 2002
... by Plasmopara halstedii L. Vajna First Report of Group 16SrIV Phytoplasmas Infecting Coconut Palms with Leaf Yellowing Symptoms on the Pacific Coast of Mexico Nigel A. Harrison, Maria Narváez, Humberto Almeyda, Ivan ... . Kotan & F. Sahin Non-cucurbitaceous weed species shown to be natural hosts of Cucumber vein yellowing virus in south eastern Spain D. Janssen, L. Ruiz, L. Velasco, E. Segundo & I.M ...
www.bspp.org.uk

Crop Diseases in Wheat 2 (Purdue University)
... Disease Name: Septoria Glume Blotch Pathogen: Fungus. Leaf and glume blotch: Septoria nodorum (Leptosphaeria nodorum), and leaf blotch: S. tritici (Mycosphaerella graminicola) Symptoms: Chlorotic (yellow ... . Barley yellow dwarf virus (BYDV) Symptoms: Stunting, mosaic, yellowing tip and margins inward and downward. Flag leaf yellowing with spring infection. Conditions: Cool, dry conditions that favor ...
www.btny.purdue.edu

CANTALOUPE DISEASES AND THEIR CONTROL
... planted. Alternaria leafspot, caused by the fungus Alternaria cucumerina, is recognized by the dark brown leaf spots with concentric rings. It can be controlled with fungicides (see Table 1). Resistant ... 0 Spray at first appearance, 7-14 day interval. Repeated use of copper might cause leaf yellowing. The following diseases are not on the Benlate label: Cercospora, Downy mildew. Anthracnose Bravo ...
www.ces.ncsu.edu

CPS-CPDS-Table of Contents-1965
... of wheat, rye and barley in Canada in 1964 Pages 23-29 D J. SAMBORSKI Leaf rust of wheat in Canada in 1964 Pages 30-32 T. F. CUDDY and V ... Diseases of grapevine in Ontario Pages 130 M. L. KAUFMANN and L. J. PIENING Oat leaf yellowing Pages 131 J. L. TOWNSHEND Plant-parasitic nematode genera associated with crops in Ontario in ...
www.cps-scp.ca

Camellia Disease and Leaf Problem
... Spider Mite Symptom -- Paprika-like spots develop along the central veins of the leaf. In time leaf develops a dull olive green appearance. Suggestions -- Spraying with malathon is the typical ... cause these symptoms. Scale Symptom -- White, often cottony, substance on the leaf underside with a yellowing of the leaf's top side opposite the substance. Suggestions -- Light infestations may possibly be ...
www.camellia.gulfcoast-gardening.com

Potato Leaf Hopper Fact Sheet  -- Bruce MacKellar <MSU Extension >
... Females deposit one to six eggs daily on plant stems, leaf petioles, and leaf veins. The nymphs hatch in about 10 days. Like adults ... the tips of the leaves. Prior to this a slight yellowing or curling of leaves occurs, which is often overlooked. Severely ... leafhopper feeding or deter leafhopper feeding because of inflorescence (or leaf hairs) on the plant leaves. These varieties are currently being ...
www.canr.msu.edu

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