At present, eggplant has entered the peak of fruit, and it is also the arrival of the high temperature season, and the diseases and insects of eggplant have also appeared, and it is very necessary to do a good job in eggplant disease and insect control at this time.
Pest
At present, eggplant insect pests mainly include tea yellow mites and red spiders
Tea yellow mite: harmful to young leaves, young stems, flower buds and young fruits. Multiple generations occur in a year, generations overlap, the suitable temperature is 23 degrees, the relative humidity is 80 to 90%, and the warmth and humidity are suitable for the occurrence of tea yellow mites. In August, the damage was the most severe, and the affected leaves stopped growing, and the back became more tea-brown and had an oily luster. The buds are killed and turn into deformed flowers, and in severe cases, the flowers do not open. After the young fruit is killed, the epidermis thickens and roughs, causing the fruit to crack, the flesh to harden, and the taste to be bitter.
Control method, spray 3000 times with 1.8% zygosin emulsion, spray on young leaves, young stems, young fruits. Do not harvest eggplant for 7 to 10 days after spraying to ensure that it is safe to eat. It can also be sprayed with 73% gram mite 2500 times, and the harvest safety period is 7 days later.
Red spider: prick the sap on the back of the leaf, so that the leaf surface is yellow-white spots, and when the leaves are severe, the leaves become yellow and scorched, and high temperatures and droughts are prone to occur.
The control method is 1500 times with 10% Liuyangmycin emulsion, and it can also be sprayed with 73% grams of mite 2500 times.
disease
Cotton blight, also known as rotten eggplant, is a disease that often occurs during the rainy season. Especially after the rain, the weather is sweltering and hot, and the suitable temperature is 25 to 30 degrees. Mainly harmful to the fruit, the fruit surface began to be water-soaked in round plaques, and then gradually expanded, spreading throughout the fruit surface, the most black and rotten.
Prevention and control method, use 75% bacillus clear wettable powder 500 to 800 times, spray every 10 days.
After the onset of the disease, the diseased plant and the residue are removed and taken out of the field for treatment.
Verticillium wilt, which harms the leaves, first fades from the leaf edge and between the leaf veins to yellow, and gradually develops to the whole leaf, and the diseased leaves develop from the bottom up. The initial sunny day wilts at noon, and returns to normal in the morning and evening.
Prevention and control method, at the beginning of the disease, the root is irrigated with 50% carbendazim 500 times liquid, 2 to 3 times continuously, with an interval of 7 days. Small occurrences can also be uprooted whole plants, and diseased plants can be taken out of the field for treatment.