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In the planting of rice, there are often pests such as sheath blight, bacterial blight, rice blast, rice planthopper, aphids, etc. during rice heading and flowering, and chemical pesticides are needed for prevention and control. However, because the flowering period of rice is a sensitive period for rice, if it is improperly controlled, it is often easy to cause phytotoxicity in rice, resulting in reduced production and reduced income. Therefore, it is very important to pay attention to the use of rice during flowering. Today, let us take a look at the main points of rice flowering.
First, avoiding medication during the chemotherapy period
When using pesticides to control rice pests and diseases, it is necessary to avoid the flowering time of rice. Generally, early and middle rice flowering time is mostly from 8:00 to 13:00, but it blooms most and most vigorously from 9:00 to 11:00; late rice usually blooms from 9:00 to 14:00, but at 10:00- It blooms most at 12:00.
When the rice is flowering, the husk is opened, and the flower is stretched to extend the pollen out of the hull. If the drug is applied at this time, the liquid or the powder is easy to enter the flower, and the damage kills the pollen, the anther, the ovary, etc.; The discussion will flush the pollen, which will affect the pollination, resulting in an increase in the rate of rice imperfections, and the husk is brown, which will reduce the yield of rice.
Therefore, rice application should be carried out after 3 pm, and the action should be light. Try to avoid hurting the ear of rice.
Second, the rational use of pesticides
When applying pesticides during flowering, it is necessary to select high-efficiency, safe, low-toxic, and residual pesticides. Do not use highly toxic and high-residue pesticides, or use prohibited pesticides, such as Liuliuliu and Sailisan. In order to prevent the pesticide content in the rice from exceeding the standard, the straw is contaminated, and the person is injured and stored healthily.
Third, strict drug concentration
It is necessary to strictly control the concentration of the drug used and the amount of the drug to be used. Because the rice ear that has just been extracted from the flowering stage is young, the resistance to chemicals is weak. Therefore, when applying pesticides, the dosage and concentration of pesticides must be strictly controlled to prevent phytotoxicity. In case of meteorological conditions such as long-term drought and dry air, the amount of water should be appropriately increased when disposing the liquid to avoid rice phytotoxicity.
More pesticide knowledge , please pay attention to China Pesticide Network
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