Cotton-grass cotton field

Scientific name Argyrogramma agnata (Staudinger) Synonyms Phytometra agnata Staudinger Lepidoptera, Noctuidae. Distributed throughout the country.

Host cotton, cruciferous, beans and other crops.

Injury characteristics When newly hatched larvae damage cotton, they are mostly fed on the back of the leaves and leave the epidermis. When the larvae grow up, the cotton leaves become short-cut or holes, and the leaves are severely eaten. Individuals have a large number of years and have a greater damage to cotton.

Morphological characteristics, living habits, see rape insects a silver-winged moth. The worm is 3-5 years old in the cotton area of ​​the Yellow River Basin and 5-6 generations in the Yangtze River Valley. It lives on the foliage or on the surface of the earth. Adults appeared in late April of the following year. The eggs were produced on the back of the middle leaves of the plant and entered the first generation of larvae from early May to late, damaging cotton.

Prevention and control methods (1) Adults are trapped using a black light or the like at the adult stage. (2) When preventing and controlling cotton bollworm, pay attention to prevention and cure. (3) When it happens, spray 90% of Wan Ling Shui agent 4500 times or 75% of Lavinine 4000 times, 10% of imidacloprid wettable powder 2500 times, 5% of Tai Tai Bao Emulsion 3000 times, 5.7% Chrysanthemum fat EC 3000 times. (4) Advocate the use of 500 times liquid of gemini powder containing more than 10 billion billion spores per g.