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Pea Leaf and Pod Spot



P_pealfpodspot

Pea Leaf and Pod Spot

Usually appear in

All Year


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Caused By:-     Various Fungi usually Ascochyta

Description

Peas can suffer from such a wide range of diseases it is a wonder it is usually an easy crop to grow. some of the diseases that affect peas are:-
Bacterial diseases
Bacterial blight, Brown spot
Fungal Diseases
Alternaria blight, Anthracnose, Aphanomyces root rot, Ascochyta blight, Ascochyta foot rot and black stem, Ascochyta leaf and pod spot, Black leaf, Cercospora leaf spot, Cladosporium blight, Damping off, seed rot, Downy mildew, Fusarium root rot, Gray mold, Near wilt, Powdery mildew, Pythium root rot and root tip necrosis, Rhizoctonia seedling rot.
Rust
Sclerotinia rot = white mold, Septoria blotch, Thielaviopsis root rot – black root rot, Wilt
Parasitic Diseases
Cyst nematode, Lesion nematode, Root-knot nematode
Viral Diseases
Cucumber mosaic virus, Pea early browning virus, Pea enation mosaic, Pea leaf roll, Pea mosaic, Pea seedborne mosaic, Pea streak, Pea stunt, Western pea streak virus

At least three fungi can cause leaf and pod spots, often called the ‘Ascochyta complex’ as the fungi involved are Ascochyta pisi, Mycosphaerella pinodes and Phoma medicaginis. Small circular sunken spots which can be up to 6mm in diameter appear on the leaves pods and stems. The perimeter of the spot is usually dark brown. As the disease develops, tiny dark raised spots appear in the spots from which more spore is produced and dispersed. In wet weather the whole crop can turn black and slimy. This can be confused with Bacterial Blight. This disease is carried over by the seeds and seeds should be obtained from a reputable source. Picture by Sam Markell, North Dakota State University, Bugwood.org.


Control

This diseaseis agravated by wet conditions and is also carried over by diseased plant materials. Therefore good husbandry in tidying up and burning diseased material is essential. Use seeds from a p reputable source as the disease can be carried in the seeds. Spraying at the first pod stages and repeated spraying at fortnightly intervals will keep this disease in check.
See also these other Eelworms CHAFER GRUBS, CHRYSANTHEMUM EELWORM, DIEBACK, EELWORMS, ENCHYTRAEID WORMS, IRIS BORER CATERPILLARS, LEAF AND BUD EELWORM, LEATHERJACKETS, LILY VIRUSES, NUT WEEVIL, ONION EELWORM, NARCISSUS EELWORM, PHLOX EELWORM, POTATO CYST EELWORM, ROOT KNOT EELWORMS, SLUGS, SNAILS, STEM AND BULB EELWORM, TOMATO CYST EELWORMS, VINE WEEVIL, WILTING, WIREWORM, WORMS.


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