In addition to tomato damage, Tomato spot blotch also harms solanaceous crops such as pepper and eggplant. The occurrence of heavy eggplant on protected areas caused serious damage to fruit quality and loss. The typical symptom of tomato spot blotch is a small spot with a fish-eye shape, with many black dots scattered on the lesion, which is different from the symptoms of spot disease and bacterial spot disease. The typical symptom of tomato spot disease is that the necrotic spot is grayish yellow or brownish, with yellowish halos on the rim or edges, and a dark gray moldy layer when wet. The typical symptoms of tomato bacterial spot disease are dark brown to dark brown, with halo, leaf margin and immature fruit disease, cold, cold, rain, and sprinkling after irrigation. Tomato spot blotch was caused by the infestation of tomato larvae. The pathogens belonged to the fungus Aspergillus spp. Mycelia or conidia were overwintered on sick bodies, perennial solanaceous weeds and seeds, becoming the source of infestation the following year. The optimum development of pathogenic bacteria is 22-26 C. Below 12°C or 27°C, it is not conducive to disease. High humidity conditions are conducive to conidial spores overflow from the conidia, suitable relative humidity of 92% to 94%, can not reach this humidity does not occur. To prevent tomato spot blight, it should be rotated for 3 to 4 years with non-solanum crops; apply fully decomposed organic fertilizer, and then apply 30 kg of micro-organism micro-organisms per acre to improve the soil; use cymoxanil 600 Double liquid, or 20% fluoromorpholine wettable powder 400 times, or 64% ?f MnZn wettable powder 500 times liquid spray, and all-soluble calcium 600 - 800 times liquid mixture control effect is better. Frequency Induction Heater ,High Frequency Induction Heating,Induction Heating Aluminum Frequency,Low Frequency Induction Heater Dongguan Jinwang Ultrasonic Equipment Co.,Ltd , https://www.jwultrasonic.com
Tomato spot blight began to occur from the lower leaves of the plants, with round or near-circular lesions appearing on the opposite sides of the leaves. The edges were dark brown, gray and white in the middle, and slightly sunken. The small black spots on the fruit were 2-3 mm in diameter. Fish-eye shape. When full, it is full of leaves, causing the leaves to turn green and yellow. Temperatures above 15°C are prone to onset in rainy weather. High temperature drought is not conducive to disease.