Rice root pests

Many diseases and insect pests will be encountered in the process of rice growth, which threaten the healthy growth of the plant. What are the root pests of rice? How to prevent and cure it?

I. Rice root pests

Rice root pests are mainly mole cricket, grub, red nematode, root-knot nematode, ground maggot, ground tiger, rice water weevil, rice root and leaf beetle and so on.

II. Rice root pest control

1. Mole cricket

On the rice seedbed, first dilute Regent 5% suspension 10-20 ml into mother solution with a little water, then mix Regent with an appropriate amount of fine soil in every 100 square meters of seedbed, evenly remove on the bed surface after leveling the seedbed, and then sow seeds; after leveling the seedbed, spray 6 kg of water on every 100 square meters of seedbed, spray on the surface of bed soil, and then sow seeds.

2. Red nematode

The main results are as follows: (1) after draining the water in the field, the pesticide is sprayed once, and after ploughing every 5-7 days, the pesticide is sprayed again.

(2) spray 2.5% cyhalothrin water emulsion 60 ml with 50 kg water per mu, 26% octyl sulphur per mu? The high cyanide fluorine EC was evenly sprayed with 70 ml of water and 50 kg of water; in the field disinfection treatment, it is recommended that quicklime should be scattered in the field, which can change the acidity and alkalinity of the field.

3. Ground maggots

(1) it is forbidden to use raw manure as fertilizer.

(2) in the land where maggots have occurred, irrigation should be carried out frequently and flood irrigation should be carried out if necessary to prevent seed flies from spawning, inhibit the activity of ground maggots and drown some larvae.

(3) spraying poison in time during the peak period of adult oviposition and the peak hatching period of larvae. The adults were sprayed with 2.5% deltamethrin 3000 times or 1000 times trichlorfon crystals for 2-3 times, once every 7 days.

(4) the field where killing larvae has occurred can be drenched with 1000 times of phoxim EC or 1000 times of 40% chlorpyrifos for 2-3 times, once every 7 days.

(5) before planting, 2.5-3.5 kg phoxim granules mixed with chemical fertilizer could kill the eggs and larvae of seed flies.

4. Rice root leaf beetle

The main results are as follows: (1) draining the field water in winter can dry and crack the soil surface and kill the overwintering larvae.

(2) thoroughly remove weeds such as Rabdosia angustifolia in the field and eliminate the intermediate host. 25% diuron 75 grams per mu can be used, 40 jin of fine soil can be sprinkled on a sunny day, and the field water is kept at about 3 cm. After 7-8 days, the leaves begin to rot and die, and the efficacy can be maintained for half a month.

(3) before transplanting seedlings, combined with the last rake of the field, 250 grams of 50% phoxim EC per mu, 20-25 kg of wet fine soil, and 20 kg of tea cake (tea bran) powder into the field to kill the larvae.

(4) during the peak period of adults, 150-200 ml of 30% acephate EC per mu, or 100-200 grams of 90% trichlorfon and 50-60 kg of water were sprayed.

The above is a simple list of rice root pests and the basic introduction of control methods, for reference only.