recent years. Mung bean pests occur frequently, mainly Bean hawk moth, blind cockroach, locust, etc., and its noctuid is the most serious. So, how should M. sylvestris pests be controlled?
First, mung bean night moth pest damage symptoms
Both pests are damaged by larvae, mung bean leaves, flowers and fruits. The younger larvae feed on mesophyll, leaving the epidermis and veins to form a transparent window-like shape. The older larvae can eat whole leaves, leaving only veins and petioles, causing serious damage. Mung bean light stalk dead tree
Second, mung bean night moth pest control method
Pest larvae are the best period of application before the 3rd age, and can be controlled by DuPont Tough (4.75% avermectin·Indoxacarb WP) 45~50g spray. At this time, the pests are small and the drug resistance is poor, and the liquid is easily immersed in the pests to kill the pests, and the "treatment is early treatment". In the fight against drugs, it is necessary to advocate "turning down the buckle, seeing through all sides", without leaving a dead angle. For the pests in the outbreak period, the application can be appropriately increased 1 to 3 times, and the dosage is increased according to the pest situation to improve the control effect. For older larvae with a higher resistance to insects than 4 years old, the larvae are more resistant to larvae, and they are encouraged to be caught early in the morning. According to the mung bean being harmed and the fresh faeces of the pests are caught nearby, the damage of the worm can be partially alleviated. At the same time, the phototaxis of Spodoptera exigua and Spodoptera litura is used to trap adult insects by black light, or to use the chemical chemotaxis of adult sweet and sour wine, carrot, sweet potato, bean cake and other fermentation broth with a small amount of insecticide or sexual attractant to trap adult It can also reduce the amount of pests.
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