Rice plants often have diseases such as sheath blight, bacterial blight, rice blast, rice planthoppers, aphids, etc., and need to be controlled by chemical pesticides. However, because the flowering period of rice is a sensitive period for rice, if it is not properly controlled, it is often easy for rice to cause phytotoxicity, resulting in reduced yields. Therefore, the following points should be noted when using pesticides to control pests during heading and flowering of rice.
First, to avoid the use of pesticides in the chemical phase of pesticide use to prevent rice pests and diseases, we must avoid the rice flowering time. Generally, the flowering time of the early and middle rice is mostly between 8:00-13:00, but the flowering is the most and most prosperous at 9:00-11:00; the late rice generally blossoms at 9:00-14:00, but at 10:00- 12:00 blooms most.
When the rice blossoms, the glume is open, and the flowers will extend rapidly to extend the pollen out of the glume. If the pesticide is applied at this time, the liquid or powder can easily enter the flower, injuring the pollen, anther, ovary, etc.; at the same time, the flower liquid The results will be washed out of pollen, thus affecting the pollination, resulting in increased rice misrepresentation, glume is brown, so that rice production is severe.
Therefore, the application of rice should be carried out after 3 pm, and the action should be light, so as to avoid touching the ear of rice.
Second, the rational selection of pesticides Rice flowering application of pesticides must choose high-efficiency, safe, low toxicity, residual pesticide residues, must not use highly toxic, high-residue pesticide species, but can not use banned pesticide species, such as 666, Saili scattered, etc., to prevent the pesticide content in rice exceeded the pollution of straw, damage people and store health.
Third, strictly control the drug concentration to strictly control the use of the concentration of the drug and the amount of drug use. Because the rice ear tissue just extracted from the flowering stage is young, its anti-pharmaceutical ability is weak. Therefore, when using pesticides, the dosage and concentration of pesticides must be strictly controlled to prevent phytotoxicity. In case of weather conditions such as drought and air drying in Jiuqing, the amount of water should be increased in the allocation of the liquid to avoid rice damage. China Agriculture Network editorial information for reference, please verify before use
First, to avoid the use of pesticides in the chemical phase of pesticide use to prevent rice pests and diseases, we must avoid the rice flowering time. Generally, the flowering time of the early and middle rice is mostly between 8:00-13:00, but the flowering is the most and most prosperous at 9:00-11:00; the late rice generally blossoms at 9:00-14:00, but at 10:00- 12:00 blooms most.
When the rice blossoms, the glume is open, and the flowers will extend rapidly to extend the pollen out of the glume. If the pesticide is applied at this time, the liquid or powder can easily enter the flower, injuring the pollen, anther, ovary, etc.; at the same time, the flower liquid The results will be washed out of pollen, thus affecting the pollination, resulting in increased rice misrepresentation, glume is brown, so that rice production is severe.
Therefore, the application of rice should be carried out after 3 pm, and the action should be light, so as to avoid touching the ear of rice.
Second, the rational selection of pesticides Rice flowering application of pesticides must choose high-efficiency, safe, low toxicity, residual pesticide residues, must not use highly toxic, high-residue pesticide species, but can not use banned pesticide species, such as 666, Saili scattered, etc., to prevent the pesticide content in rice exceeded the pollution of straw, damage people and store health.
Third, strictly control the drug concentration to strictly control the use of the concentration of the drug and the amount of drug use. Because the rice ear tissue just extracted from the flowering stage is young, its anti-pharmaceutical ability is weak. Therefore, when using pesticides, the dosage and concentration of pesticides must be strictly controlled to prevent phytotoxicity. In case of weather conditions such as drought and air drying in Jiuqing, the amount of water should be increased in the allocation of the liquid to avoid rice damage. China Agriculture Network editorial information for reference, please verify before use
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