Effective varieties for controlling rice stem borer, Chilo suppressalis
(1) fipronil. The recommended dose is 1.5-2.5 g active ingredient / mu. The technical points used are as follows: spraying in the peak incubation period of stem borer eggs, keeping water layer or no water layer in the field. As fipronil is highly toxic to aquatic organisms and to special prawns and crabs, it should not be used in bee farming areas and shrimp and crab farming areas. If you want to use fipronil, it is recommended to drain the field water before using it. After using fipronil in rice fields, the water should not be discharged into fish ponds and ditches.
(2) fipronil + trichlorfon (1:49). The recommended dose is 50 grams of active ingredient per mu. The technical points of application are as follows: spraying during the peak incubation period of stem borer eggs, it is best to keep the water layer in the field. Do not use it in shrimp and crab farming areas.
(3) triazophos. The recommended dose is 30 to 40 grams of active ingredients per mu. The key points of application technology are as follows: spraying in the peak incubation period of stem borer eggs. Due to the long residual period of triazophos and its stimulating effect on rice brown planthopper, triazophos should be used before heading stage and recommended in early rice or the first half of the year. It is not suitable to be used in areas where Chilo suppressalis is highly resistant to triazophos.
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Agricultural measures for controlling Rice pests
In recent years, with the increasing occurrence of rice pests, the use of some toxic and residual pesticides in rice is also gradually increasing, which brings hidden dangers to rice safety. In view of this situation, the author has purposefully carried out agricultural control research in the demonstration area since 2004. through two years of practice, the results show that agricultural measures are applied to rice pest control. it has more unique and excellent effect than chemical control, biological control and physical mechanical control, and can improve the control of rice pests.
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Measures for controlling Bad Seedling Disease of Rice
At present, seed soaking is the method to control rice evil seedling disease in production, and the main varieties of fungicides used are "901", Ximiaoling, Yiziling, prochloraz and so on. Some fungicides have been used in our province for more than ten years, long-term use of a single fungicide will cause pathogens to produce drug resistance, thus affecting the germicidal efficacy. When soaking the seeds, it is generally required to stir once or twice a day. There are all these kinds of pesticides in the field investigation, but there are differences in specific operation, and there are also significant differences in control effects among different agents. Low temperature and seed
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