Symptom Infected seeds gets mottled. Diseased plants are usually stunted with distorted (puckered, crinkled, ruffled, stunted, narrow) leaves. The parts are often stunted. Flattened or curved and contain fewer and smaller seed. Infected seeds fail to germinate

Symptom Infected seeds have irregularly shaped tan or light brown sunken lesions. Infected leaves appears as water soaked at first instance. They soon take on a greenish brown to reddish brown appearance. The infected portion later turns tan brown or black in

Symptom Light to dark gray or brown areas varying from specks to large blotches appear on seeds. The disease primarily affect foliage, but, stems, pods and seeds may also be infected. Leaf lesions are circular or angular, at first brown then light brown to ash

Collar rot / Sclerotial blight : Sclerotium rolfsii. Symptom Infection usually occurs at or just below the soil surface. Sudden yellowing or wilting of plants is the first symptom. Light brown lesions, which quickly darken, enlarge until the hypocotyl or stem

Charcoal rot, ashy or stem blight or dry root rot : Macrophomina phaseolina

Cercospora leaf blight, leaf spot and Purple seed stain : Cercospora kikuchii

Symptom Seeds may develop raised or sunken lesions and become shriveled and discolored. Small, angular, translucent, water-soaked, yellow to light brown spots appear on leaves. Young leaves are most infected and are destroyed, stunted and chlorotic. Angular le

Symptom Infected seeds become shriveled, mouldy and brown. Symptoms on cotyledons appear as dark brown sunken cankers. In early stage, irregular brown lesions appear on leaves, stems and pods. In advanced stages, the infected tissues are covered with black fru

Symptom Characteristic symptom is conspicuous systemic bright yellow mottling of leaves. The yellow area are scattered or occur in indefinite bands along the major veins. Rusty necrotic spots appear in the yellow areas as the leaves mature. Management Rogue ou

Symptom Seed become small and shriveled. Dark, irregular, spreading sunken areas occur on the seed. Appearance of brown, necrotic spots with concentric rings on foliage, which coalesce and form large necrotic areas. Infected leaves later in the season dry out

The eggs are laid on leaves. After hatching from the egg yellowish maggots bore the nearest vein of the leaf. The maggot then reach the stem through petiole and bore down the stem. If the infected stem is opened by splitting, distinct zig zag reddish tunnel ca

Girdle beetle: Oberea (Obereopsis) brevis Symptoms of damage Girdling of stems and petioles The inside of the stem is eaten by the larvae and a tunnel is formed inside the stem. The leaves of plant of infected portion are unable to get the nutrient and are dri

Jassids: Apheliona maculosa Symptoms of damage Infested leaves start yellowing from the margins. In case of severe attack, all the leaves become yellow and eventually fall off from the plants. Identification of the pest Adults and nymphs : are light green in c

They suck the plant sap from the stem, leaves and pods which cause reduction in yield. The infested leaves are wilted or curled. Plant stunting, reduced pod and seed counts, puckering and yellowing of leaves. Identification of the pest Winged adults: Have a bl

White fly: Bemisia tabaci Symptoms of damage Due to attack of the insect the leaves turn yellow and become curled. This insect spread the mosaic disease in soybean. Identification of the pest Nymphs and pupae : Black and round or oval. Pupae have marginal bris

Thrips: Thrips tabaci Symptoms of damage The infected leaf turns whitish-brown in colour. In case of heavy infestation the leaves get dry and drop down and slowly the plant becomes leafless. Management Dusting of cow dung ash and spraying of clay suspension as

Larvae feed on the chlorophyll of the leaves. The eaten leaves give the appearance of whitish yellow web. Egg: Egg masses appear golden brown. Larva: Pale greenish with dark markings. Gregarious in the early stages Forewings : Brown colour with wavy white mark

The young larvae feeds on the chlorophyll of young leaves and skeletonize it. They feed voraciously on the foliage in early stage, may defoliate the plant and later they feed on flowers and pods. Identification of the pest Eggs: Spherical in shape and creamy w

Young larvae feed gregariously on chlorophyll mostly on the under surface of the leaves, due to which the leaves look like brownish-yellow in colour. In later stages the larvae eat the leaves from the margin. The leaves of the plant give an appearance of net o