Key Points for Prevention and Control of High-quality Rice Pests and Weeds in Hubei Province
2018-04-28 14:00:33
Main prevention and technical measures (1) Agricultural control
1, scientific management of water, timely field. The impacts of water conditions on pests and diseases in paddy fields are various and the mechanism is also very complex. In general, irrigation deep water and long-term or even full-time water stagnation are conducive to the occurrence of most pests and diseases, and the field has a good control. The scientific method of water management is to insist on shallow ground irrigation and timely field drying. It is necessary to grasp the principle of "when the time is not the same when seedlings and Miao are not equal". “Time to time†means that our province generally requires early rice in late May and mid-season rice in the end of June to control ineffective delivery and reduce the occurrence of pests and diseases; “Miao Qi is not equivalent†means that when the effective seedlings per acre reach a certain standard (early rice 280,000, medium rice 250,000) when the field, control of rice populations, to avoid excessive density aggravate pest damage. It is advisable to dry the fields with cracks on the surface, dew white roots, and non-stick feet of mud. At this time, rehydration can be performed. After that, stick to shallow water and ground until harvesting. At the same time, we must ensure that when pesticides are used to control pests, there is a 5-7cm water layer in the field.
2, formula fertilization, balanced nutrition. The partial application of nitrogenous fertilizer and excessive application of nitrogenous fertilizer will aggravate the degree of occurrence of pests; increasing phosphorus, potassium and silicon fertilizers can all increase rice resistance to pests and diseases. According to the results of more than 20 controlled nitrogen and potassium-enhanced pest control studies organized by the provincial Plant Protection Station in 2005, the application of pure nitrogen per acre for early, mid and late rice in our province should generally be controlled within 11.5, 14.5, and 12.5 kilograms, respectively. At the same time, according to the results of soil nutrient determination, determine the amount of phosphorus and potassium fertilizers, and apply a certain amount of silicon fertilizer.
(2) Light trapping technology The frequency-vibration insecticidal lamp is installed at a standard of 50 acres per lamp (about 180 meters between lamps), and the bottom of the lamp is 1.5 meters above the ground. According to researches in recent years, the frequency-vibration type insecticidal lamp has a good control effect on S. japonicum, S. japonica, C. medinalis, etc., and can reduce the amount of eggs deposited by about 60%, but it is more effective against natural enemies. small. The reason is that these pests have a strong phototaxis, and the main group of predators in the paddy field are spiders, which are not directly affected by the light.
(III) Chemical Control
1, early and middle rice seed disinfection. The sun-dried seeds were soaked in fresh water for 24 hours, and then soaked in 25% EC (100 grams, keeping fresh grams) 2000-3000 times for 24 hours to prevent Bakanae, Phytophthora infestans, and cotton rot. Drain after soaking, germination to the dew-white, bud after sowing.
2, weeding, live field weeding. 1-5 days after sowing, mu pre-emergence herbicide precloam (Safote) 30% EC100-150ml uniform spraying. Wet fields were kept within 3 days after treatment, and annual weeds such as Putian grass, cattle felt, and duckweed were controlled. For example, the amount of barnyardgrass in the field is still relatively large. After the two-leaf stage of the rice seedlings, mu using dichlorobenzyl 36% WP30g or quinclorac 50% WP (padrell) 30g, spraying water. The field water was discharged 1 day before spraying, and the water was reconstituted 24 hours after the drug was sprayed.
3, early and middle rice paddy field disease prevention and treatment. For instance, the continuous rainy weather in Putian City will increase the monitoring of seedlings. If you see seedlings, 40% WP80g of tricyclazole per mu, control the spray of water.
4. Pest control in Putian. Medium rice Putian focuses on the prevention and control of the first generation of rice borer, rice weevil, and thrips; single-season late rice and late rice fields, and focuses on the prevention and control of the thrips. A second generation of Sichuang in the incubation period of egg hatching, mu with fipronil 5% SC (Ruijinte) 30-40ml; control of rice weevil, mu with triazophos 20% EC100ml; control of rice thrips, mu for imidacloprid 10% WP15-20g, spray on water.
5. Daejeon Chemical Weeding. Weeding in transplanted fields should be based on the local grasses, selecting economical, safe and efficient herbicides, mastering the correct methods of pesticide application, and conducting timely chemical weeding. For alfalfa, dwarf mushroom, abalone, cattle felt, artichoke, eye sub-grass, four-leaf Ping and heterophylla more fields, acres with ethyl bromide 25% WP20-30g, after transplanting 7 - 10 days, 10 kg of mixed fine soil applied, so that the field after the drug to maintain 7-10cm water layer for 7 days; grass is the dominant population of the field, acres with quinclorac (Wu Da Zhuang) 50% WP30g; three Prunus edulis is the dominant population of plots, with 20% aqueous solution of dimethyl tetrachlorohydrin 100-150 ml per mu; Qianjin is the dominant population of the plot, and mufluoxamate 10% EC (thousand gold) 30-50 ml and other pharmaceutical agents. Drug control.
6, sheath blight. In the period of high tillering, the incidence of Rhizoctonia solani is up to 10%, and 2 mg of Jinggangmycin is applied to 25 g of WP25g. Every 7 days, Jinggangmycin or Difenoconazole 30% EC (Ai Miao) 15ml is used. The rice plant sprayed in the middle and lower parts.
7, rice smut. 5-7 days before the rice break, mu using difenoconazole 30% EC (Ai Miao) 15ml, or Jinggangmycin 25g, or carbazolone 40% WP80-100g; Qi heading period reuse 70% thiophanate-methyl 100g or Ai Miao spray control once.
8, rice blast disease. After the transplanting, in case of continuous rainy weather, strengthen the monitoring of leafhoppers. In the early stage of disease, add 20% liquid 80-100ml of rice, 40% EC75ml of Fuji No.1, 20% WP100g of Tricyclazole, or 12% of Cd. SC35ml, spray on water. At the beginning of the breakout period, tricyclazole was used in rainy weather, and Fuji No. 1 was used to prevent panicle rice blasts at the same dose.
9. II. In the middle paddy field, the second generation is mainly controlled and the second and third generations of key rice fields in late season are controlled. 120-300 acres of egg-bearing paddy fields, with 18% of insecticidal double 200ml + BT powder 50g, or triazophos 15% ME (microemulsion) 100g; egg size of more than 300 rice fields, choose fipronil 5% SC30-40 ml, 2% EC 100 ml of oxazole, 40 g of fipronil 5% SC15 ml + BT powder, or 48% EC 200 ml of chlorpyrifos, sprayed with water.
10, three of the three. The first and second generations are both effective in the prevention and control of pests such as pupa, and they are focused on the prevention and control of the third generation. For middle rice, if the break period coincides with the hatching of the third-generation rice stem borer, use 18% of insecticidal water-repellent 200ml + BT powder 50g for irrigation during rice breakage to prevent white panicles. Single-season late rice fields prevent dead heart, dead booties, and pharmaceuticals are the same as before.
11. Rice leaf roller. The middle rice field focuses on the second generation (from the end of June to early July) and the third generation (from the end of July to the beginning of August), and the single-season late rice field focuses on the prevention of the third and fourth generations (before and after August 20th). Prevention of the fourth generation. A total of 100 cultivars were used to control the standard, with 50% EC80ml of enemy fluoronitrile (Tiger frog) and 21% EC 150ml of fluorozolium (Shanrui). 2% EC 100ml of azole, if the old larvae in the field (3-4 years old, more than 3 silks in the mouthwash) have a large residual amount, 31% ME100ml of nitropyrazole (triterpenoid) is used to spray water.
12, rice plant fly. Early rice focuses on the second generation (late June to early July); middle rice and single-season late rice mainly control the third generation (late July to early August), and the fourth generation (late August to early September); In the fourth and fifth generations (before and after National Day), in the nymph ramp-up period, the number of worms was 1,500, and 10% WP 30g of imidacloprid or 40% of WP 80g of buprofezin was used. Cars and bases are used to ensure prevention and control. In the absence of water in the field, mu is applied with 80% of 300ml of dichlorvos EC and 10kg of fine soil.
Precautions
1. To delay the development of insecticide resistance, the above-mentioned agents and their compound preparations must be used interchangeably.
2. Triazophos easily leads to the regeneration of rice planthoppers, and should be used sparingly in areas where rice planthoppers are heavy.
3, rice field can not use long-residue herbicide containing metsulfuron, chlorsulfuron, etc., so as not to produce phytotoxicity on the crop after the crop.
4. Due to the great differences in natural conditions and cultivation habits between the east, west, south, north, and south of the province, the growth period and the types of occurrence and occurrence of the diseases and insect pests in rice vary greatly. All regions must strengthen the forecasting and reporting. Item technology.
5, spray application of water per acre, manual sprayer after booting 50L per mu, motorized sprayer delivery period of 12-15L per mu, after booting 20L per mu.
1, scientific management of water, timely field. The impacts of water conditions on pests and diseases in paddy fields are various and the mechanism is also very complex. In general, irrigation deep water and long-term or even full-time water stagnation are conducive to the occurrence of most pests and diseases, and the field has a good control. The scientific method of water management is to insist on shallow ground irrigation and timely field drying. It is necessary to grasp the principle of "when the time is not the same when seedlings and Miao are not equal". “Time to time†means that our province generally requires early rice in late May and mid-season rice in the end of June to control ineffective delivery and reduce the occurrence of pests and diseases; “Miao Qi is not equivalent†means that when the effective seedlings per acre reach a certain standard (early rice 280,000, medium rice 250,000) when the field, control of rice populations, to avoid excessive density aggravate pest damage. It is advisable to dry the fields with cracks on the surface, dew white roots, and non-stick feet of mud. At this time, rehydration can be performed. After that, stick to shallow water and ground until harvesting. At the same time, we must ensure that when pesticides are used to control pests, there is a 5-7cm water layer in the field.
2, formula fertilization, balanced nutrition. The partial application of nitrogenous fertilizer and excessive application of nitrogenous fertilizer will aggravate the degree of occurrence of pests; increasing phosphorus, potassium and silicon fertilizers can all increase rice resistance to pests and diseases. According to the results of more than 20 controlled nitrogen and potassium-enhanced pest control studies organized by the provincial Plant Protection Station in 2005, the application of pure nitrogen per acre for early, mid and late rice in our province should generally be controlled within 11.5, 14.5, and 12.5 kilograms, respectively. At the same time, according to the results of soil nutrient determination, determine the amount of phosphorus and potassium fertilizers, and apply a certain amount of silicon fertilizer.
(2) Light trapping technology The frequency-vibration insecticidal lamp is installed at a standard of 50 acres per lamp (about 180 meters between lamps), and the bottom of the lamp is 1.5 meters above the ground. According to researches in recent years, the frequency-vibration type insecticidal lamp has a good control effect on S. japonicum, S. japonica, C. medinalis, etc., and can reduce the amount of eggs deposited by about 60%, but it is more effective against natural enemies. small. The reason is that these pests have a strong phototaxis, and the main group of predators in the paddy field are spiders, which are not directly affected by the light.
(III) Chemical Control
1, early and middle rice seed disinfection. The sun-dried seeds were soaked in fresh water for 24 hours, and then soaked in 25% EC (100 grams, keeping fresh grams) 2000-3000 times for 24 hours to prevent Bakanae, Phytophthora infestans, and cotton rot. Drain after soaking, germination to the dew-white, bud after sowing.
2, weeding, live field weeding. 1-5 days after sowing, mu pre-emergence herbicide precloam (Safote) 30% EC100-150ml uniform spraying. Wet fields were kept within 3 days after treatment, and annual weeds such as Putian grass, cattle felt, and duckweed were controlled. For example, the amount of barnyardgrass in the field is still relatively large. After the two-leaf stage of the rice seedlings, mu using dichlorobenzyl 36% WP30g or quinclorac 50% WP (padrell) 30g, spraying water. The field water was discharged 1 day before spraying, and the water was reconstituted 24 hours after the drug was sprayed.
3, early and middle rice paddy field disease prevention and treatment. For instance, the continuous rainy weather in Putian City will increase the monitoring of seedlings. If you see seedlings, 40% WP80g of tricyclazole per mu, control the spray of water.
4. Pest control in Putian. Medium rice Putian focuses on the prevention and control of the first generation of rice borer, rice weevil, and thrips; single-season late rice and late rice fields, and focuses on the prevention and control of the thrips. A second generation of Sichuang in the incubation period of egg hatching, mu with fipronil 5% SC (Ruijinte) 30-40ml; control of rice weevil, mu with triazophos 20% EC100ml; control of rice thrips, mu for imidacloprid 10% WP15-20g, spray on water.
5. Daejeon Chemical Weeding. Weeding in transplanted fields should be based on the local grasses, selecting economical, safe and efficient herbicides, mastering the correct methods of pesticide application, and conducting timely chemical weeding. For alfalfa, dwarf mushroom, abalone, cattle felt, artichoke, eye sub-grass, four-leaf Ping and heterophylla more fields, acres with ethyl bromide 25% WP20-30g, after transplanting 7 - 10 days, 10 kg of mixed fine soil applied, so that the field after the drug to maintain 7-10cm water layer for 7 days; grass is the dominant population of the field, acres with quinclorac (Wu Da Zhuang) 50% WP30g; three Prunus edulis is the dominant population of plots, with 20% aqueous solution of dimethyl tetrachlorohydrin 100-150 ml per mu; Qianjin is the dominant population of the plot, and mufluoxamate 10% EC (thousand gold) 30-50 ml and other pharmaceutical agents. Drug control.
6, sheath blight. In the period of high tillering, the incidence of Rhizoctonia solani is up to 10%, and 2 mg of Jinggangmycin is applied to 25 g of WP25g. Every 7 days, Jinggangmycin or Difenoconazole 30% EC (Ai Miao) 15ml is used. The rice plant sprayed in the middle and lower parts.
7, rice smut. 5-7 days before the rice break, mu using difenoconazole 30% EC (Ai Miao) 15ml, or Jinggangmycin 25g, or carbazolone 40% WP80-100g; Qi heading period reuse 70% thiophanate-methyl 100g or Ai Miao spray control once.
8, rice blast disease. After the transplanting, in case of continuous rainy weather, strengthen the monitoring of leafhoppers. In the early stage of disease, add 20% liquid 80-100ml of rice, 40% EC75ml of Fuji No.1, 20% WP100g of Tricyclazole, or 12% of Cd. SC35ml, spray on water. At the beginning of the breakout period, tricyclazole was used in rainy weather, and Fuji No. 1 was used to prevent panicle rice blasts at the same dose.
9. II. In the middle paddy field, the second generation is mainly controlled and the second and third generations of key rice fields in late season are controlled. 120-300 acres of egg-bearing paddy fields, with 18% of insecticidal double 200ml + BT powder 50g, or triazophos 15% ME (microemulsion) 100g; egg size of more than 300 rice fields, choose fipronil 5% SC30-40 ml, 2% EC 100 ml of oxazole, 40 g of fipronil 5% SC15 ml + BT powder, or 48% EC 200 ml of chlorpyrifos, sprayed with water.
10, three of the three. The first and second generations are both effective in the prevention and control of pests such as pupa, and they are focused on the prevention and control of the third generation. For middle rice, if the break period coincides with the hatching of the third-generation rice stem borer, use 18% of insecticidal water-repellent 200ml + BT powder 50g for irrigation during rice breakage to prevent white panicles. Single-season late rice fields prevent dead heart, dead booties, and pharmaceuticals are the same as before.
11. Rice leaf roller. The middle rice field focuses on the second generation (from the end of June to early July) and the third generation (from the end of July to the beginning of August), and the single-season late rice field focuses on the prevention of the third and fourth generations (before and after August 20th). Prevention of the fourth generation. A total of 100 cultivars were used to control the standard, with 50% EC80ml of enemy fluoronitrile (Tiger frog) and 21% EC 150ml of fluorozolium (Shanrui). 2% EC 100ml of azole, if the old larvae in the field (3-4 years old, more than 3 silks in the mouthwash) have a large residual amount, 31% ME100ml of nitropyrazole (triterpenoid) is used to spray water.
12, rice plant fly. Early rice focuses on the second generation (late June to early July); middle rice and single-season late rice mainly control the third generation (late July to early August), and the fourth generation (late August to early September); In the fourth and fifth generations (before and after National Day), in the nymph ramp-up period, the number of worms was 1,500, and 10% WP 30g of imidacloprid or 40% of WP 80g of buprofezin was used. Cars and bases are used to ensure prevention and control. In the absence of water in the field, mu is applied with 80% of 300ml of dichlorvos EC and 10kg of fine soil.
Precautions
1. To delay the development of insecticide resistance, the above-mentioned agents and their compound preparations must be used interchangeably.
2. Triazophos easily leads to the regeneration of rice planthoppers, and should be used sparingly in areas where rice planthoppers are heavy.
3, rice field can not use long-residue herbicide containing metsulfuron, chlorsulfuron, etc., so as not to produce phytotoxicity on the crop after the crop.
4. Due to the great differences in natural conditions and cultivation habits between the east, west, south, north, and south of the province, the growth period and the types of occurrence and occurrence of the diseases and insect pests in rice vary greatly. All regions must strengthen the forecasting and reporting. Item technology.
5, spray application of water per acre, manual sprayer after booting 50L per mu, motorized sprayer delivery period of 12-15L per mu, after booting 20L per mu.