At present, the most commonly used insecticides for controlling brown planthopper include neonicotinoids, insect growth regulators, triazinones, carbamates, organophosphorus, etc.; the most commonly used chemical insecticides for controlling rice leaf roller Single agents include organophosphorus, bisamides, macrolides, sodium channel inhibitors, and the like.
Thiamethoxam, dinotefuran, fluramide and imidacloprid are all neonicotinoid agents, which act on nicotinic acetylcholine receptors and can effectively control a variety of sucking mouthparts pests. After monitoring the high level of resistance to imidacloprid in the field in 2005, it has been requested by the Ministry of Agriculture to suspend its use. Subsequently, thiamethoxam was recommended as an alternative agent, but with the increase in the use of thiamethoxam, the brown planthopper The level of resistance to oxazine increased significantly, resulting in less than 80% of field control effects, while the control effect of dinotefuran and fluniguanamine was more than 85%.
As a synthetic inhibitor of chitin in insects, with the production of resistance to imidacloprid by brown planthopper, imidacloprid was stopped in the control of brown planthopper and the ban of fipronil in rice fields. Buprofezin became the main drug variety for controlling brown planthopper one. In 2012, it was found that the population of brown planthopper in Jiangsu Province had a high level of resistance to buprofezin. In view of the fact that the current field efficacy of buprofezin is still not good (below 50%), it is recommended to temporarily stop the use of buprofezin to control brown planthopper.
The pymetrozine acts on the insect needle and causes a blocking effect, causing the pest to stop feeding and eventually starving to death, and the process is irreversible. Although pymetrozine is relatively effective against brown planthopper, the resistance of brown planthopper to pymetrozine can not be ignored, and the resistance of chlorpyrifos to pymetrozine in the field is obviously increased.
Chloramphenicol benzamide, fipronilamide, cyanamide, and tetrachlorazamide are newly developed nitinine receptor activators and have excellent activity against pests such as lepidoptera. From the field control effect, the control effect of chlorantraniliprole, fipronil and tetrachloramide on rice leaf roller is better than that of cyanamide.
Both indoxacarb and cyanofluorfen act on the voltage-gated sodium ion channel of the insect nervous system, irreversibly blocking the transmission of nerve impulses in the insect, leading to the movement of the pest, the inability to eat, paralysis and eventually death. From the field control effect, the insecticidal effect and insecticidal effect of indoxacarb and cyanofluorfen on rice leaf roller are more than 80%, which can be used as a selective agent for controlling rice leaf roller.
Profenofos, Dafengsan and Chlorpyrifos are all organophosphorus insecticides. These agents mainly kill insects by inhibiting the activity of their target acetylcholinesterase. From the field control results, the insecticidal effects of profenofos, rice scatter and chlorpyrifos were all above 80%, the leaf-preserving effect was below 70%, and the insecticidal effect was significantly better than the leaf-preserving effect.
The rice “two-shift†pests have long-distance migration habits. In the process of prevention and control, the migration area and the migration interval, between the upper and lower generations of the same area, should rotate and alternately use different action mechanisms and no interaction. Resistant insecticides, avoiding continuous, single use. It can effectively delay the development of resistance to brown planthopper by alternately rotating with dinotefuran, fluramide, pymetrozine, thiamethoxam, and alternately using bisamides, organophosphorus, indoxacarb, and cyanofluorfen. To effectively delay the development of resistance to rice leaf roller.
Thiamethoxam, dinotefuran, fluramide and imidacloprid are all neonicotinoid agents, which act on nicotinic acetylcholine receptors and can effectively control a variety of sucking mouthparts pests. After monitoring the high level of resistance to imidacloprid in the field in 2005, it has been requested by the Ministry of Agriculture to suspend its use. Subsequently, thiamethoxam was recommended as an alternative agent, but with the increase in the use of thiamethoxam, the brown planthopper The level of resistance to oxazine increased significantly, resulting in less than 80% of field control effects, while the control effect of dinotefuran and fluniguanamine was more than 85%.
As a synthetic inhibitor of chitin in insects, with the production of resistance to imidacloprid by brown planthopper, imidacloprid was stopped in the control of brown planthopper and the ban of fipronil in rice fields. Buprofezin became the main drug variety for controlling brown planthopper one. In 2012, it was found that the population of brown planthopper in Jiangsu Province had a high level of resistance to buprofezin. In view of the fact that the current field efficacy of buprofezin is still not good (below 50%), it is recommended to temporarily stop the use of buprofezin to control brown planthopper.
The pymetrozine acts on the insect needle and causes a blocking effect, causing the pest to stop feeding and eventually starving to death, and the process is irreversible. Although pymetrozine is relatively effective against brown planthopper, the resistance of brown planthopper to pymetrozine can not be ignored, and the resistance of chlorpyrifos to pymetrozine in the field is obviously increased.
Chloramphenicol benzamide, fipronilamide, cyanamide, and tetrachlorazamide are newly developed nitinine receptor activators and have excellent activity against pests such as lepidoptera. From the field control effect, the control effect of chlorantraniliprole, fipronil and tetrachloramide on rice leaf roller is better than that of cyanamide.
Both indoxacarb and cyanofluorfen act on the voltage-gated sodium ion channel of the insect nervous system, irreversibly blocking the transmission of nerve impulses in the insect, leading to the movement of the pest, the inability to eat, paralysis and eventually death. From the field control effect, the insecticidal effect and insecticidal effect of indoxacarb and cyanofluorfen on rice leaf roller are more than 80%, which can be used as a selective agent for controlling rice leaf roller.
Profenofos, Dafengsan and Chlorpyrifos are all organophosphorus insecticides. These agents mainly kill insects by inhibiting the activity of their target acetylcholinesterase. From the field control results, the insecticidal effects of profenofos, rice scatter and chlorpyrifos were all above 80%, the leaf-preserving effect was below 70%, and the insecticidal effect was significantly better than the leaf-preserving effect.
The rice “two-shift†pests have long-distance migration habits. In the process of prevention and control, the migration area and the migration interval, between the upper and lower generations of the same area, should rotate and alternately use different action mechanisms and no interaction. Resistant insecticides, avoiding continuous, single use. It can effectively delay the development of resistance to brown planthopper by alternately rotating with dinotefuran, fluramide, pymetrozine, thiamethoxam, and alternately using bisamides, organophosphorus, indoxacarb, and cyanofluorfen. To effectively delay the development of resistance to rice leaf roller.
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