Occurrence law of rod hook

The insect occurs twice a year, 1 year in Northeast China and North China 1 generation. Overwintering in soil with eggs. In May of the following year, the eggs hatch, and the newly hatched nymphs cluster on the leaves, eating mesophyll first to make the leaves reticular. From mid-May to early June, nymphs hatch and eat grass and flowers. The first generation of adults began to lay eggs in early July. Male adults crawl on the back of female insects, so they are called "negative locusts". Generally, eggs are laid in sunny hard soil, and the number of eggs is large, and each egg is more than 10 to 20. There is yellowish brown secretion outside the egg mass. The second generation nymphs began to hatch in late July, with the peak in the middle and early August, and the second generation adults began to lay eggs in the middle and late September-65438+1early October, with the peak in the late October-165438+1late October. The overwintering nymphs of eggs gather at the initial incubation and disperse after the second instar.