Introduction to the time for prevention and control of rice drill beetles!

The heart-drilling insect, also known as Chilo suppressalis, Chilo suppressalis, is an important rice pest in coastal and river plain areas, which seriously affects the yield of rice. When is the time for the control of rice drill beetles? How to prevent and cure it?

When is the control time of rice drill beetle?

Generally, the effect of drug application is better in the peak period of adults and hatching period of larvae, that is, before it enters the rice plant. Among them, the control time of Chilo suppressalis and Chilo suppressalis should also be paid attention to:

The main results are as follows: (1) Rice stem borer (Chilo suppressalis) usually occurs 1m away from the ridge of the paddy field. When the stem is about 10cm on the water surface, the leaf sheath is irregular yellowing, and the heavy ones are accompanied by brown stripes. When the leaf sheath is removed, the larvae of Chilo suppressalis will be found in it, which is the best time for control.

(2) the best control time of rice stem borer (Chilo suppressalis) should be determined by pest situation and seedling condition. The control of withered seedlings is dominated by insect conditions, that is, the peak period of egg block hatching, the second day of blackening at the bottom of 50% egg blocks is the peak period of hatching, and it is the best time to control withered seedlings.

How to prevent and control rice heart-drilling insects?

1. Agricultural prevention and control

First, ploughing the land to reduce the source of insects. The second is to adjust the sowing date to stagger the period of 3 to 5 true leaves of vegetable seedlings with the peak period of Chilo suppressalis, and the third is to irrigate properly to increase the humidity in the field.

two。 Chemical control

Spraying control must be carried out during the peak period of adults and the hatching period of larvae. You can choose 2500 to 3000 times of chlorhexidine EC and 800x of Bt wettable powder, which should be applied or selected early, or 21% EC 2000 times, 20% Chrysanthemum EC or 10% Chrysanthemum Horse EC 1000 times, or 2.5% Kung Fu EC 3000 times, or 10% Kongfu suspensions 2000 times, or 20% fenvalerate EC 3000 times, or 5% rifampin EC 3000 times, or 10% Uranus EC 3000 times. Or 5.7% Baishu EC 2500 times, or 2.5% diazepam EC 3000 times, or diflubenzuron No. 3 suspension 100.

Rice drill beetle is the most common and harmful pest of rice, so growers must do a good job of prevention and control in advance.