How to control rice thrips

(1) Life habits:

The body of rice thrips is very small, and the length of the adult is only 1 mm-1 mm, 5 mm, dark brown. In winter, adults overwinter in Gramineae weeds and wheat crops. During the self-rearing period of the next year, when the seedlings grow to 2-3 leaves, they fly into the seedling field to lay eggs and reproduce. The worm is small, very active, and can fly and jump. The adults tend to be green, and the seedlings are rich in food at the tillering stage after transplanting, which is conducive to mass spawning and harmful to heart leaves and young tissues. The leaves showed small white spots at the initial stage, and the upper part of the leaf tip was curled, which made the rice seedlings grow slowly, reduce or stop tillering, and die when the damage was serious.

(2) Prevention and control methods:

Like other pests, it is necessary to apply adequate basic fertilizer in seedling fields and fields, apply formula fertilization or apply new humic acid compound fertilizer to control the normal growth of seedlings and rice seedlings, so as to restrain the fecundity of adults and reduce the damage. Pesticide control: 3 tablets at seedling stage-4 leaf stage and 7 days before transplanting-once each, 40% omethoate emulsion 75ml-100ml, add water 50kg spray per mu; or 20% triazophos emulsion 75ml, add water 50kg spray; or 50% malathion EC 1000 times-1500 times; or 25% insecticidal Shuang 200g-250g, add water 50kg spray.

Rice thrips damage to the female parent seedlings of hybrid rice seed production, when serious, make the female parent late, resulting in the parents do not meet at this flowering stage. The most effective control measure is to apply 2 kg carbofuran per mu before sowing the field for the last time in Yangyi field. With this treatment, the seedling stage can be protected from harm.