How to treat eggplant leaf disease

Eggplant is a vegetable that we often eat in our daily life. It is native to tropical Asia and is now distributed all over the world. It is cultivated most in Asia, accounting for about 74% of the world's total output; Europe is second, accounting for about 14%. It is cultivated all over China and is one of the main vegetables in summer. So in the eggplant planting process leaves produce disease how to treat it?

1. Main diseases and control of eggplant leaves

The main diseases that harm eggplant leaves are gray mold, cotton blight, brown spot, brown spot, powdery mildew, leaf mold, bacterial wilt, etc.

Botrytis cinerea mainly occurs in winter greenhouse eggplant and early spring cultivation, cold autumn and winter areas in southern China. Botrytis cinerea mainly damages young fruits and leaves, and also infects stems when it is severe. The infected leaves showed typical V-shaped spots, serious large spots, causing the whole leaves to dry up. The main measures are to control the temperature and humidity in the shed and indoor, remove the diseased fruits and leaves in time, carry them out of the shed and bury them deeply, spray 50% Sukeling WP 2000 times solution, 38% 8-pyridoxine 800 times solution, 41% polyastine 600 times solution for drug treatment.

Eggplant cotton blight, also known as blight, is one of the three major diseases that harm eggplant. It mainly infects leaves, stems, flowers and fruits. Serious disease often causes a large number of fruit rot, which directly affects yield. The main control measures are selection of disease-resistant varieties, seed disinfection, rotation, careful selection of land, etc. There is no drug treatment.

Eggplant brown streak is a unique disease of eggplant, mainly manifested as round to irregular spots on leaves, small black seeds on the spotted surface, serious peeling of stem and branch cortex, resulting in branch or whole plant death. The main control measures are clearing weeds in the field and around, burning or composting, rotating with non-undergraduate crops, selecting disease-resistant varieties, transplanting seedlings, etc., spraying 75% chlorothalonil WP 1000 times solution, 50% captan WP 500 times solution, 65% zineb WP 500 times solution, 40% flusilazole EC 8000 times solution, etc. during seedling stage, spraying: 600 times solution of 75% chlorothalonil WP, 400~500 times solution of 70% manineb WP, 500 times solution of 65% zinc formate WP, 1:1:200 Bordeaux mixture.

Brown spot disease often occurs in eggplant seedling stage and middle and late growth, mainly damaging leaves. The infected leaves were light brown spots, light gray brown spots in the spots, and water-soaked halo brown spots in the early stage of adult leaves. The main control methods were rotation for more than 2 years, reasonable irrigation, mulching film, etc. The drug measures were spraying 600~700 times solution of 75% chlorothalonil WP or 500 times solution of 70% mancozeb WP, 500 times solution of 64% sandufan WP and 500 times solution of 58% metalaxyl manganese zinc WP at the early stage of disease. Chlorothalonil was discontinued 7 days before harvest and 3 days before harvest.

Powdery mildew of eggplant is one of the common diseases of eggplant. At the beginning of the disease, irregular chlorotic yellow spots appear on the leaves, white spots appear on the corresponding parts of the back of the leaves, and later the number of spots increases, and the white powder is increasingly obvious and white spots appear. At the early stage of the disease, the control measures were spraying 15% triadimefon WP 1000 - 1500 times, or 20% triadimefon EC 2000 times, 40% sulfur suspension or 36% thiophanate-methyl suspension 500 - 600 times, 50% sulfur suspension 300 times.

Leaf mold mainly damages the leaves and fruits of eggplant. The infected leaves initially showed inconspicuous chlorotic spots at the edges, and there were olive green villous molds on the back of the infected spots, i.e. conidia and conidia of the pathogen, and the diseased leaves fell off early. At the early stage of disease, spraying 50% thiophanate-methyl or sulfur suspension 800 times solution, or Aitfu emulsifiable concentrate 800~1200 times solution, or 10% Shigao (difenoconazole) 2000 times solution, or 47% Garinone wettable powder 800~1000 times solution.

The symptom of eggplant bacterial wilt is that the leaves of individual branches or one leaf partially droop at the initial stage, and then gradually expand to the whole branch. At the early stage of disease, 4000 times solution of 72% agricultural streptomycin sulfate soluble powder or 500 times solution of 50% copper succinate wettable powder was used to irrigate each plant with 0.3~0.5 liters of liquid medicine once every 10 days for 3~4 times.

The above is the main disease of eggplant leaves, when eggplant leaves appear abnormal symptoms, to determine the cause in time, in order to find the cause, timely symptomatic treatment.