How to do gourd leaf infestation?

Gourd is a kind of climbing vine plant belonging to Cucurbitaceae and Cucurbita. In Chinese traditional culture, the gourd is the symbol of Fu Lu. The shape of the gourd is beautiful, the color of the finished product is as yellow as gold, and the moral is very auspicious, which is very loved by people. But the growth of a gourd is not as easy as making gourd handicrafts, and it has to experience a lot of wind and rain pests, so what should be done when the leaves of the gourd are infested?

1. Treatment after infestation of gourd leaves.

The common pests in gourd leaves are aphids, cotton bollworm, whitefly, red spider, leaf miner and so on. The type of pest should be determined according to the specific symptoms in order to prescribe the right medicine.

Aphids can make gourd leaves deformed and wrinkled, and will spread the virus, and its secretions can also induce coal fouling disease, so we must pay attention to prevention and control. The breeding rate of aphids is very high, and if it is not controlled in time, the young leaves of the whole plant and most of the nearby plants will soon be affected. After a small amount of aphids are found, you can squeeze them by hand, rinse them with water, or wash them with soapy water. The drug treatment is to spray 2000 times of 20% methamphetamine EC, or 3000 times of 2.5% Uranus EC, or 1500 times of 25% dimethoate EC, or 1000 times of 40% dimethoate EC, or 20% compound liuyangmycin EC 1000 times, etc.

Helicoverpa armigera (the second generation of larvae) generally harms the flowers and tender fruits of the gourd, will form holes and defects, and affect the normal development of the gourd. In the control of Helicoverpa armigera, artificial trapping or light trapping can be used to kill adults, and the main control methods are spraying dichlorvos EC plus dimethoate EC, or selecting top 100 to spray evenly during the peak egg hatching period.

The excrement of adult whitefly not only affects the respiration of gourd plants, but also causes diseases such as soot disease. The back of whitefly gourd secretes a large amount of honeydew, causing a large number of fungi to multiply, affecting normal respiration and photosynthesis. the main control measures are manual hunting or light trapping, or using 10% imidacloprid 400-600 times liquid, or 10% buprofezin EC 1000 times, or 25% buprofezin EC 1500 times for spray.

Red spiders often wither and whiten the leaves of the whole plant. The common control method is to use 1000-fold solution of 10% bendazalin EC or 10% EC (such as Guoguang Hongxie) 1000 times solution + 5.7% methylvitamin salt EC (such as Guoguang Lok) 3000 times mixture and spray control, which is recommended to be used twice at intervals of 7-10 days.

Leaf miner mainly affects plant photosynthesis by larvae feeding in the leaves or petioles of the plant, forming linear or curved coiled irregular pathways. Adults mainly lay eggs on the back of the leaves and should be sprayed on the back of the leaves. Or spray to control larvae at the beginning of the harm, spray the larvae for 2 times or 3 times continuously, and use 40% dimethoate EC 1000 times, 40% omethoate EC 1000 times 2000 times, and so on.

These are the common pests of cucurbit leaves. Aphids and cotton bollworms are the most common pests, which are relatively easy to identify and can be prescribed to the case.