(1) Harmful conditions are also known as soybean meal, soybean meal, and soybean meal. In China, the distribution is relatively common, and serious south of the Yangtze River. The larvae feed on the host flower organ, resulting in falling flowers; eating lobster sauce, early cause desolate, and later cause pods and seeds rot. In addition, it is also possible to spine several leaves together and the larvae eat the leaves in it; or to eat the tender stems, resulting in shoots that have a great influence on the yield and quality.
(2) Morphological characteristics Adults have a length of 13 mm, a wingspan of 24 to 26 mm, a dark tan, two white transparent spots in the middle of the forewings, white translucent hind wings, and dark brown ripples on the inside. Oval flat oval, light green, hexagonal pattern. The mature larvae are 18 mm long, brown on the head and thoracic spine, and yellow-green in color. The dragonfly is 13 mm long, yellow-brown.
(3) Life habits vary from generation to generation throughout the generation. Nocturnal, from 12:00 to 1 midnight is the height of adult activity, adult phototaxis. The bean pods are hi-warming pests that occur particularly in southern China. For example, it can occur in the North China region for 3-4 generations in one year, and the wintering occurs in the area where the earthworms enter the soil. In the South China region, the larvae live in winter or no overwintering phenomenon. Generally from June to July to September to October this year is the culmination of this pest.
(4) Prevention and control methods 1 Remove the fallen flowers and falling leaves in time, and remove the affected leaves and pods to reduce the source of insects.
2 Black light in the field to trap and kill adult worms.
3 Spray pesticides, such as 50% dichlorvos EC 800 times, or 25% Chrysanthemum 3000 times, or 10% diflubenzumine, 2.5% deltamethrin, 10% cypermethrin, etc. 3000-4000 times each . From buds, buds and flowers are sprayed every 10 days.
Cereal vegetables Mung bean pests: bean soup
2022 09/12