The color of the caterpillar may vary from pale cream or green to nearly black. beds with 1 mm thick black polythene sheets for 48 hours to The symptoms may appear only on a few branches. Tomato Disease Identification Key By Affected Plant Part: Stem and Whole Plant Symptoms . It is very difficult to control nematodes in an infested field since the eggs survive in the soil protected by host tissues. The fungus produces both macro conidia and micro conidia. The fungus produces zoospores under advanced conditions. Spray fifteen days' old panchagavya, diluted with ten parts of water. Since the disease appears early in the season, it is known as early blight. The pathogen is soil borne. The plants remain pale and stunted and pod set is extremely low. The anthracnose lesions easily attract other rotting organisms which now completely rot the infected fruit. Bronzing of the upper surface of young leaves which extends from leaf blade to petiole and stem, causing upward rolling of leaves. Pumpkin 82 viii. frequent irrigation and application of well decomposed These are gram positive, non-motile strains of bacteria, which prefer a temperature of 24–27 oC. The spots are irregular in shape, dark brown in colour with concentric lines in the centre. The other species of fungi causing fruit rot both in the field and in storage are Fusarium sp., â¦ The leaves show light and dark green mosaic symptoms. Crop rotation with cruciferous vegetables, field bean, maize or soybean, Seedling root dip in asafoetida solution (@ 10g/litre of water). Fungal species such as Paecilomyces lilacinus, Verticillium Seed treatment using leaf extract of Bougainvillea glabra (@. Occurs at the seedling stage and with older plants. Crop rotation – avoid growing solanaceous crops in sequence. If a segment of a lower stem is cut, it yields bacterial ooze. Use varieties like Mar globe, Kanora, Sioux and Roma which are resistant. Stem lesions are black and canker-like and the fruit lesions are corky. kill nematodes and weed seeds. It is a fungus that thrives in warm, wet conditions and lives in the soil. Small, water-soaked spots first appear which later become raised and enlarge until they are one-eighth to one-fourth inch in diameter. The organism survives in alternate hosts, on volunteer tomato plants and on infected plant debris. The upper- and undersides of the affected leaves with yellow will turn, irregularly-shaped spots on the upper-side and fuzzy olive-greenâ¦ Newly hatched larvae are small, slender and about 0.3–0.5 mm in length. Crop Protection :: Post Harvest Diseases Fruits: Apple: Banana: Citrus: Grapes: Guava : Mango: Papaya: Sapota Though fruit infection is uncommon, the destruction of foliage can lead to fruit failure or make fruit prone to sunscald. Greenback, Green shoulders or Yellow shoulder disorder is a condition of ripening tomatoes.The disorder is caused by high temperatures and too much exposure to sunlight. Cultivation of the crop has been abandoned in some parts of the country due to the disease. A few research reports also suggest that wilting is caused by the toxins produced by the fungus. Infected unripe fruits do not show symptoms until ripening. Seeds may be the primary source of infection, and soil the secondary source. This is a deadly disease of tomato. The other species of fungi causing fruit rot both in the field and in storage are Fusarium sp., Alternaria solani, Rhizopus sp. infection. Five kilos of wood ash should be mixed with 50 litres of water and kept aside for two hours. The lower leaves are more susceptible than the upper ones. Leaf mold: It is the most common tomato crop disease. 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