Diseases of Tomato Damping off: Pythium aphanidermatum Symptoms Damping off of tomato occurs in two stages, i.e. the pre-emergence and the post-emergence phase. In the pre-emergence the phase the seedlings are killed just before they reach the soil surface. The young radical and the plumule are killed and there is complete rotting of the seedlings. […]

Diseases of Tea Blister blight – Exobasidium vexans Symptoms Small pale or pinkish circular spots appear on leaves and attain a size of 2.5 cm diameter. The spots in the upper surface of the leaf becomes light brown in color and depressed while in under surface of leaf it bulges farming a blister like swelling. […]

Diseases of Rose Black spot- Diplocarbon rosae Economic Importance Black spot of rose is a serious problem in chill and cold climate of temperate regions. The disease causes marked reduction in the size and number of flowers. Symptoms Black lesions with feathery margins surrounded by yellow tissue are found on the leaves. Infected leaves drop […]

Diseases of Potato Late blight of potato: Phytopthora infestans Symptom:  It affects leaves, stems and tubers.  Water soaked spots appear on leaves, increase in size, turn purple brown& finally black colour White growth develops on under surface of leaves. This spreads to petioles, rachis& stems. It frequently develops at nodes. Stem breaks at these points and the plant topples over. […]

Diseases of Pomegranate and Papaya Pomegranate Cercospora fruit Spot: Cercospora sp. Symptom The affected fruits showed small irregular black spots, which later on coalesce, into big spots. Management The diseased fruits should be collected and destroyed. Two to three spray at 15 days interval with Mancozeb 0.25%. Leaf Spot or Blight: Colletotrichum gloesporioides; Pseudocercospora punicae; […]

Diseases of Onion & Garlic Basal Rot: Fusarium oxysporum f.sp. cepae Symptoms The leaves turn yellow and then dry up slowly. The affected plant shows drying of leaf tip downwards. The entire plant shows complete drying of the foliage. The bulb of the affected plant shows soft rotting and the roots get rotted. There will […]

Diseases of Mulberry Mulberry Root rot- Macrophomina phaseolina Symptoms Sudden wilting, withering of leaves and affected plants fail to sprout after pruning and dry up completely. Affected plants can be pulled out easily. Rotting of primary and secondary roots, rotten roots turn black and roots contain large number of black sclerotia. Decay of root bark. […]

Diseases of Mango Anthracnose: Colletotrichum  gloeosporioides Symptoms: The disease appears on young leaves, stem, inflorescence and fruits. Leaves show oval or irregular, greyish-brown spots which may coalesce to cover larger area of the leaf. The affected leaf tissues dry and shred. Leaves on infected petioles droop and fall. On young stem, grey-brown spots develop. These […]

Diseases of Jasmine Cercospora leaf spot – Cercospora jasminicola Economic Importance In India, the disease was first reported in 1946. Now it’s known to be widely distributed. Symptoms Circular to irregular reddish brown spots of 2-8 mm dia appear on the surface of the leaves. Later the spots become irregular covering larger areas of the […]

Diseases of Grapes Downy mildew: Plasmopara viticola Symptoms Irregular, yellowish, translucent sports on the upper surface of the leaves. Correspondingly on the lower surface, white, powdery growth on leaves. Affected leaves become, yellow, brown and gets dried. Premature defoliation. Dwarfing of tender shoots. Brown, sunken lesions on the stem. White growth of fungus on berries […]