Prevention and control technology of rice diseases and insect pests in August (management scheme for prevention and control of rice diseases, pests and weeds)

Insect pests mainly occurred in early August in rice operation areas in Heilongjiang Province. The larvae chew mesophyll along the veins, forming white stripes. Especially after three days, the increase in food intake will gnaw the leaves into many notches. When the larvae mature, they spin silk at the tips of rice leaves and fold the leaves to make leaf bracts. 2.5% Kung Fu or Bayeufukuan is often used for flying defense.

How to control diseases, pests and weeds in rice in August?

At present, the key period of rice growth is the end of July and the beginning of August, which is the flowering and fruiting period when rice enters the heading stage.

This month is the forming period of rice yield. During this period, rice is most susceptible to diseases such as rice blast, sheath blight and bacterial browning, and also susceptible to chilling injury and some pests.

So we farmers must pay close attention to field management in this period, so what should we do?

(1) First, prevent diseases and healthy plants.

From mid-late July to early August, rice will suffer from epidemic diseases and ear neck diseases, especially in planting fields. According to the weather changes, we will carry out flight prevention and health care for rice in time.

Recommend several commonly used formulas

(1) pyraclostrobin+thifluzamide+Bacillus subtilis+Yuntai element+potassium dihydrogen phosphate can not only control rice sheath blight and other diseases, but also increase production.

(2) pyraclostrobin+kasugamycin+Bacillus subtilis preparation+Yuntaisu+potassium dihydrogen phosphate can control rice blast and bacterial brown ear disease. After spraying once, you can spray it again about 10 days.

2, pest control

Insect pests mainly occurred in early August in the rice operation area of Heilongjiang Province, and larvae fed on mesophyll along the veins, forming white stripes.

Especially after three days, when the food intake increases, the leaves will be gnawed into many notches, and when the larvae mature, they will spin silk at the tip of the rice and fold into leaf buds. 2.5% Kung Fu or Bayeufukuan is often used for flying defense.

③ Weed treatment

In August, the weeding operation at the long panicle stage basically ended, but there are still some residual weeds in the field and weeds on the ridge, which can not be ignored.

They are the root of weeds in the coming year. We should pull out weeds and rice barnyard grass in time and spray glyphosate +2.4 to kill the stalks in the pond. Keep the field clean, prevent weeds from spreading and repeating, and create a good ventilation and light-transmitting environment for rice.

In short, it is the key to prevent diseases and insects that rice enters the long panicle stage in August! Preventive health care is very important. If the field management is well managed, our rice yield will naturally not be less.