What is the adult of rice red and white nematode

A lot of insect pests are encountered in the process of rice growth, and sometimes when patrolling the fields, a group of rice red and white nematodes are found in the rice fields. What is the adult of rice red and white nematode? How to carry out prevention and control?

I. what is the adult of rice red and white nematode

The adult of rice red and white nematode is rice chironomid, which is an insect of Chironomidae. The larvae harm the roots of rice, affect the normal growth and development of rice, and even cause floating seedlings and dead seedlings. Rice chironomid generally produces four generations a year, overwintering as adults. The overwintering adults appeared at the end of April of the following year, began to lay eggs in early May, and the first generation of larvae occurred in mid-May. The first generation of adults began at the end of May, selecting clayey plots such as black soil, meadow soil, saline-alkali soil and old paddy fields to lay eggs. The eggs hatched in 4-5 days, and the larvae swam and dived to the roots of rice to feed on the young roots. The larvae are red when they grow to 2 mm. Since then, they have been living on the rice roots in the live mud and continue to do harm. The larvae pupated after 12-14 days. Among the four generations of rice chironomid, the first and second generation larvae do more harm to rice. Although the third and fourth generation larvae also live in the rice field, they basically have no harmful symptoms.

2. Control of rice chironomid

The main results are as follows: 1. When rice chironomid damage occurs, drainage and drying the field for 2-3 days.

2. Chemical control:

The main results are as follows: (1) according to the dosage standard of 100-200 grams per mu, the dosage of copper sulfate is calculated, packed into cloth bags, placed at the water inlet, and flowed into the paddy field with irrigation water, which can not only control insects but also prevent moss. After the water is drained, a cloth pocket containing 90% crystal trichlorfon is placed at the inlet. When the water is about 1 inch deep, the inlet is blocked. After 12 hours, it can be found that the rice chironomid crawled out of the water surface and died of poisoning.

(2) apply pesticide in the soil layer of the root zone after withdrawing water. Use 15% chlorpyrifos (Lesben) granules 70-100g per mu, or 3% furan granules 133-200g, mix soil or spread fertilizer. You can also choose 48% chlorpyrifos, 50-80 ml water spray per mu, 41% Avi chlorpyrifos 75-100 grams per mu water spray, 90% crystal trichlorfon 600 times liquid spray, depending on the condition of the insect spray 1-2 times.

The above is the basic introduction of rice red and white nematode adults, do a good job in nematode control, so that rice roots can develop faster and better.