2. Seed collection: you can catch mature larvae in the wild and then put them in the field for breeding. About 8 wild larvae will be raised in a 1 square meter breeding field. Then the larvae can eat the planted soybeans, and after a period of eating, they will start to sleep in the soil in September. Then cut off the soybeans, do not plough, and keep the environment. You can also buy larvae directly for stocking.
3. pupation, spawning and hatching: the temperature rises in April to pupate in the soil. During pupation, soybeans should be replanted, and adults will emerge in June, and then they will start to spawn. Eggs are usually laid on the back of soybean leaves, and adults will spawn three hours after mating. During this period, it is necessary to prevent them from flying out of the breeding field. An adult lays more than 2 eggs at a time. Eggs basically hatch in July.
4. Feeding: before pupation, soybean is planted for food, and the larvae of 9 square meters breeding field need one acre or two acres of soybean leaves for feeding throughout the larval stage. Hatched larvae can be raised indoors, just like silkworms, in separate ponds, covered with gauze to prevent escape, and fresh bean leaves can be picked and scattered for feeding. Feeding leaves increases according to the age of larvae.
5. Keep the seeds: In September, it is necessary to select strong and mature larvae and put them in the breeding field, let them overwinter, and then pupate and emerge in the next year, and mate and lay eggs to hatch new larvae. This is to set aside the next year's insect species, and it is necessary to keep them in this way every year in the future.