The pests and diseases that occur in the early stage of rice (seedling stage) are mainly rice blast and rice blast, followed by blight, mite, rice locust and aphid. Focus on “preventing seedlings†and “protecting leavesâ€, and apply pesticides as much as possible to treat pests and diseases, reduce the frequency and dosage of application, reduce costs and reduce pollution.
1. Rice blast: Rice blast is a close-range climate disease. The variability of the pathogen is large, and the prevention and control is difficult, and there is a slight omission and the control effect is very poor. The early stage of rice (seed period) mainly prevents seedlings. The purpose is to reduce the source of bacteria in the field and prevent the spread of disease. (1) Soaking seeds with "strong chlorin" solution, treating both mite and smut, combined with the application of fabric growth regulator "Shuo 481" soaking seeds, germination and sowing, increasing germination rate, promoting rooting and hair growth, and enhancing seedlings Disease resistance, reduce seedling stage blight, green (yellow) blight caused by "dead seedlings", to ensure that Miao Qi, Miao Zhuang. (2) Before transplanting the seedlings in the field, you can use 20% tricyclazole or 75% Jinzhuo, 75% Fengdeng, add rice, etc. 50 kg of foliar spray (for 3-5 days before transplanting), In order to carry the medicine to transplant Honda. It is also possible to use the conventional tricyclazole dip method to reduce the occurrence of Honda seedlings. (3) Before Honda or no-tillage, Honda first removes weeds with paraquat (grass-free), then sprays “free-deep tillage†with rain and wet conditions to improve soil agglomerate structure and transparency, and enhance soil water retention. The ability to protect fertilizers creates good growth and development conditions for seedlings after transplanting. Then, 5-7 days after transplanting the seedlings, combine the cockroaches and apply the “Jindaolong†herbicide herbicide to clear one. In order to promote the rapid growth of seedlings, more trees, in the tillering stage, apply a "golden knives" to lay the foundation for disease prevention and production. (4) After transplanting, the seedlings (leaf) are still occurring. The above-mentioned agents can be used, even if the tissue is controlled, to reduce the source of rice in the middle and late stages of rice, and control the leaf mites.
2. Rice blast: The common rice blast in our province includes Chilo suppressalis, Sanhua carp and Daphnia. These three aphids often occur in rice fields; the secondary mites are dominant, and some areas have damage. The larvae and the big cockroaches hunted over the winter in the rice stalks, straw, wheat, corn and other weeds and weeds rhizosphere and soil gaps; the larvae of the radix sylvestris were only wintering in the stems of rice and rice stems. . The stem borer occurs in Sichuan for 2-3 generations a year. The first generation dampens the seedlings and early planted rice seedlings in the field, causing the dead sheath and the heart; the second generation harms the Honda rice, causing the dead sheath, the dead ear, and the white Spikes and injured plants. The main hazard of the stem borer is white spikes.
The prevention and control of the first generation of phlegm and phlegm should focus on Putian, adopting the strategy of “striking one generation, regulating the second generation†and “pressing one control and twoâ€, and treating both Sanhua and Daxie. Perennial application in the middle and upper reaches of May; for some rice fields that are not timely controlled in the field, attention should also be paid to the prevention and control of the first generation of stem borer in the field, and the control index is about 5%. The main agent can be selected from 20% swirling star emulsifiable concentrate or 22% cut emulsified milk or sharpen, dead cockroach, insects without trace, giant thunder and other agents. In rice areas where rice blast has not yet developed resistance to insecticides that have been used for many years, such agents can still be used; secondly, bt emulsions, Bishuang, etc. can also be used. With the above-mentioned medicament, 50 kg of water per acre, conventional spray or motorized spray. After application, it is best to maintain the field water layer for 2-3 days, the effect is better.
(Sichuan Agricultural Economic Network Expert Advisory Committee He Ming)
1. Rice blast: Rice blast is a close-range climate disease. The variability of the pathogen is large, and the prevention and control is difficult, and there is a slight omission and the control effect is very poor. The early stage of rice (seed period) mainly prevents seedlings. The purpose is to reduce the source of bacteria in the field and prevent the spread of disease. (1) Soaking seeds with "strong chlorin" solution, treating both mite and smut, combined with the application of fabric growth regulator "Shuo 481" soaking seeds, germination and sowing, increasing germination rate, promoting rooting and hair growth, and enhancing seedlings Disease resistance, reduce seedling stage blight, green (yellow) blight caused by "dead seedlings", to ensure that Miao Qi, Miao Zhuang. (2) Before transplanting the seedlings in the field, you can use 20% tricyclazole or 75% Jinzhuo, 75% Fengdeng, add rice, etc. 50 kg of foliar spray (for 3-5 days before transplanting), In order to carry the medicine to transplant Honda. It is also possible to use the conventional tricyclazole dip method to reduce the occurrence of Honda seedlings. (3) Before Honda or no-tillage, Honda first removes weeds with paraquat (grass-free), then sprays “free-deep tillage†with rain and wet conditions to improve soil agglomerate structure and transparency, and enhance soil water retention. The ability to protect fertilizers creates good growth and development conditions for seedlings after transplanting. Then, 5-7 days after transplanting the seedlings, combine the cockroaches and apply the “Jindaolong†herbicide herbicide to clear one. In order to promote the rapid growth of seedlings, more trees, in the tillering stage, apply a "golden knives" to lay the foundation for disease prevention and production. (4) After transplanting, the seedlings (leaf) are still occurring. The above-mentioned agents can be used, even if the tissue is controlled, to reduce the source of rice in the middle and late stages of rice, and control the leaf mites.
2. Rice blast: The common rice blast in our province includes Chilo suppressalis, Sanhua carp and Daphnia. These three aphids often occur in rice fields; the secondary mites are dominant, and some areas have damage. The larvae and the big cockroaches hunted over the winter in the rice stalks, straw, wheat, corn and other weeds and weeds rhizosphere and soil gaps; the larvae of the radix sylvestris were only wintering in the stems of rice and rice stems. . The stem borer occurs in Sichuan for 2-3 generations a year. The first generation dampens the seedlings and early planted rice seedlings in the field, causing the dead sheath and the heart; the second generation harms the Honda rice, causing the dead sheath, the dead ear, and the white Spikes and injured plants. The main hazard of the stem borer is white spikes.
The prevention and control of the first generation of phlegm and phlegm should focus on Putian, adopting the strategy of “striking one generation, regulating the second generation†and “pressing one control and twoâ€, and treating both Sanhua and Daxie. Perennial application in the middle and upper reaches of May; for some rice fields that are not timely controlled in the field, attention should also be paid to the prevention and control of the first generation of stem borer in the field, and the control index is about 5%. The main agent can be selected from 20% swirling star emulsifiable concentrate or 22% cut emulsified milk or sharpen, dead cockroach, insects without trace, giant thunder and other agents. In rice areas where rice blast has not yet developed resistance to insecticides that have been used for many years, such agents can still be used; secondly, bt emulsions, Bishuang, etc. can also be used. With the above-mentioned medicament, 50 kg of water per acre, conventional spray or motorized spray. After application, it is best to maintain the field water layer for 2-3 days, the effect is better.
(Sichuan Agricultural Economic Network Expert Advisory Committee He Ming)
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