With the adjustment of the agricultural industry structure, vegetable production has developed rapidly, and the area of ​​cabbage planted in cruciferous crops has expanded year by year. This is a food-feeding cabbage moth, which provides abundant foodstuffs, plus Plutella xylostella and Pieris rapae. The generational cycle is short. The large amount of eggs laid, making it the most common and serious pest in the cruciferous vegetables of our county. The two insects often mixed, so we carried out an experimental study on the control techniques of Plutella xylostella and P. rapae. The test results are reported below.
l, materials and methods
1.1 Test agent 118.1% Fu Rui emulsifiable concentrate (Sino-US joint venture Suzhou Fumeishi Plant Protection Agent Co., Ltd.); 220% Green Defu Microemulsion (Zhejiang Haiyan Pesticide Factory); 31.5% vegetable Dan Wet powder (Wuhan Kono Biological Pesticide Co., Ltd.); 435% chlorpyrifos EC (Hangzhou Zilong Chemical Co., Ltd.); 544% Sukai emulsifiable concentrate (German Chemical Co., Ltd.); 65% taibao emulsifiable concentrate (Japan Ishihara Industry) Co., Ltd.; 75% Regent Suspending Agent (Rhoen Planck, France); 84.5% emulsification of emulsifiable concentrate (Jiangsu Pesticide Research Institute); 910% of sterilizing agent (BASF China Ltd. Plant Protection Department) ).
1.2 The experimental design test was conducted on August 20-27, 2001 at the vegetable base of Chengbei Village, Wuyuan Town, Haiyan County. The test crop was broccoli. A total of 10 treatments: A, 18.1% Fu Rui 2 oo0 times liquid; B, 20qc green Defu 1000 times liquid; C, 1.5% vegetable Dan 600 times liquid; D, 35% poisoning death 800 times liquid; E, 44% speed Kai 1000 times liquid; F, 5% inhibition Taibao 1200 times liquid; G, 5% sharp Jinte 2000 times liquid; H, 4.5% killing enemy 1500 times liquid; I, 10% divided 1500 times liquid; J, water control. Set 3 repetitions, a total of 30 plots, randomized block design, the area of ​​the plot is 6.67m2, sprayed with Shandong guardian backpack manual sprayer on the morning of August 20, the dosage of liquid medicine is 60k·667m2. During the test, the average temperature was 26 °C, 1-3 worms accounted for 65%, 4-5 worms accounted for 35%, and there was a rain on the fourth day after application.
1.3 Survey method Six broccoli were listed in each plot. The number of insect populations was investigated before application. The residual insects were investigated on 1, 3, and 7 days after application. The population reduction rate and corrective effect were calculated, and analysis of variance was performed. LSR method).
2, results and analysis
2.1 Controlling the effect of the small camel moth From the test results, the control agent has a great difference in the control effect against the larvae of Plutella xylostella. One day after the drug, the correction effect of Ruijinte 2000 times liquid is 91. .81%, the best effect, followed by killing the enemy 1500 times liquid, Green Defu 1000 times liquid, in addition to 1500 times the liquid, the correction control effect was 87.26%, 84.51%, 81.27%, 4 treatment rooms There was no significant difference, and all showed good quick-acting effect; the remaining treatment effects were below 80%.
Three days after the drug, the treatment effects of each treatment increased. Rui Jinte 2000 times liquid, killing 1500 times liquid. In addition to 1500 times the liquid effect is ideal, the corrective control effect is 96.25%, 95.78%, 93.09%; followed by Green Defu and Vegetable Dan, the corrective control effect is 82.24% and 80.17%, respectively. There was no significant difference between the treatments, and the remaining treatments were inferior.
7 days after the drug, the correction effect was further increased to 98.12%; the sharpness was maintained at 90%, and the effect was good; the control effect of the green defoam and the enemy-killing treatment area decreased, respectively. 17% and 74.91%, but there was no significant difference between the first two treatments, and the rest of the treatment of young larvae rose faster and the effect was generally poor.
2.2 Controlling the effects of Pieris rapae Each treatment has good control effect on cabbage caterpillars. One day after the drug, the anti-Taibao effect was slower, the control effect was 48.89%, and the other treatments were all above 90%, and the quick-acting effect was good. Three days after the drug, the treatment effects of each treatment reached 100%. 7 days after the drug, the effect of removing the enemy and killing the enemy was still 100%. Ruijin Tespeed Kai and Vegetable Dan were better, 98.01%, 96.90% and 90.12%, respectively, both showed good holdings. Effectiveness, the rest of the treatment dropped faster, but the control effect was above 80%.
3. Summary 1 From the comprehensive control effect of the 9 insecticides tested for 1 week, when the mixture of Plutella xylostella and Pieris rapae occurs, 10% is removed, 5% Regent, 5% is killed, etc. The pyrrole insecticide has good quick-acting effect, and the effective period is about 7 days, and it is low in toxicity and safety. It is the first choice for prevention and treatment; secondly, it contains 20% green Defoam and 1.5% vegetable and other avermectin-containing drugs. The effect is 80 to 90%. It can be used when the Plutella xylostella is lightly produced; in order to prevent resistance to Plutella xylostella, it is recommended to use the above agents alternately.
25% inhibition of Taibao has been promoted in our county for many years. Plutella xylostella has developed a high resistance to pesticides, and it has poor control effect against Plutella xylostella. It is no longer recommended to control Plutella xylostella.
3 Furui, Duoweiwei, Sukai and other high-efficiency pyrethroid pesticides or mixed with chlorpyrifos have a general control effect on Plutella xylostella. When the two insects are mixed and mainly Plutella xylostella, it should not be used.
4 According to the activity characteristics of Plutella xylostella, catch the morning or evening, focus on the heart leaf and leaf back spray to improve the control effect.
l, materials and methods
1.1 Test agent 118.1% Fu Rui emulsifiable concentrate (Sino-US joint venture Suzhou Fumeishi Plant Protection Agent Co., Ltd.); 220% Green Defu Microemulsion (Zhejiang Haiyan Pesticide Factory); 31.5% vegetable Dan Wet powder (Wuhan Kono Biological Pesticide Co., Ltd.); 435% chlorpyrifos EC (Hangzhou Zilong Chemical Co., Ltd.); 544% Sukai emulsifiable concentrate (German Chemical Co., Ltd.); 65% taibao emulsifiable concentrate (Japan Ishihara Industry) Co., Ltd.; 75% Regent Suspending Agent (Rhoen Planck, France); 84.5% emulsification of emulsifiable concentrate (Jiangsu Pesticide Research Institute); 910% of sterilizing agent (BASF China Ltd. Plant Protection Department) ).
1.2 The experimental design test was conducted on August 20-27, 2001 at the vegetable base of Chengbei Village, Wuyuan Town, Haiyan County. The test crop was broccoli. A total of 10 treatments: A, 18.1% Fu Rui 2 oo0 times liquid; B, 20qc green Defu 1000 times liquid; C, 1.5% vegetable Dan 600 times liquid; D, 35% poisoning death 800 times liquid; E, 44% speed Kai 1000 times liquid; F, 5% inhibition Taibao 1200 times liquid; G, 5% sharp Jinte 2000 times liquid; H, 4.5% killing enemy 1500 times liquid; I, 10% divided 1500 times liquid; J, water control. Set 3 repetitions, a total of 30 plots, randomized block design, the area of ​​the plot is 6.67m2, sprayed with Shandong guardian backpack manual sprayer on the morning of August 20, the dosage of liquid medicine is 60k·667m2. During the test, the average temperature was 26 °C, 1-3 worms accounted for 65%, 4-5 worms accounted for 35%, and there was a rain on the fourth day after application.
1.3 Survey method Six broccoli were listed in each plot. The number of insect populations was investigated before application. The residual insects were investigated on 1, 3, and 7 days after application. The population reduction rate and corrective effect were calculated, and analysis of variance was performed. LSR method).
2, results and analysis
2.1 Controlling the effect of the small camel moth From the test results, the control agent has a great difference in the control effect against the larvae of Plutella xylostella. One day after the drug, the correction effect of Ruijinte 2000 times liquid is 91. .81%, the best effect, followed by killing the enemy 1500 times liquid, Green Defu 1000 times liquid, in addition to 1500 times the liquid, the correction control effect was 87.26%, 84.51%, 81.27%, 4 treatment rooms There was no significant difference, and all showed good quick-acting effect; the remaining treatment effects were below 80%.
Three days after the drug, the treatment effects of each treatment increased. Rui Jinte 2000 times liquid, killing 1500 times liquid. In addition to 1500 times the liquid effect is ideal, the corrective control effect is 96.25%, 95.78%, 93.09%; followed by Green Defu and Vegetable Dan, the corrective control effect is 82.24% and 80.17%, respectively. There was no significant difference between the treatments, and the remaining treatments were inferior.
7 days after the drug, the correction effect was further increased to 98.12%; the sharpness was maintained at 90%, and the effect was good; the control effect of the green defoam and the enemy-killing treatment area decreased, respectively. 17% and 74.91%, but there was no significant difference between the first two treatments, and the rest of the treatment of young larvae rose faster and the effect was generally poor.
2.2 Controlling the effects of Pieris rapae Each treatment has good control effect on cabbage caterpillars. One day after the drug, the anti-Taibao effect was slower, the control effect was 48.89%, and the other treatments were all above 90%, and the quick-acting effect was good. Three days after the drug, the treatment effects of each treatment reached 100%. 7 days after the drug, the effect of removing the enemy and killing the enemy was still 100%. Ruijin Tespeed Kai and Vegetable Dan were better, 98.01%, 96.90% and 90.12%, respectively, both showed good holdings. Effectiveness, the rest of the treatment dropped faster, but the control effect was above 80%.
3. Summary 1 From the comprehensive control effect of the 9 insecticides tested for 1 week, when the mixture of Plutella xylostella and Pieris rapae occurs, 10% is removed, 5% Regent, 5% is killed, etc. The pyrrole insecticide has good quick-acting effect, and the effective period is about 7 days, and it is low in toxicity and safety. It is the first choice for prevention and treatment; secondly, it contains 20% green Defoam and 1.5% vegetable and other avermectin-containing drugs. The effect is 80 to 90%. It can be used when the Plutella xylostella is lightly produced; in order to prevent resistance to Plutella xylostella, it is recommended to use the above agents alternately.
25% inhibition of Taibao has been promoted in our county for many years. Plutella xylostella has developed a high resistance to pesticides, and it has poor control effect against Plutella xylostella. It is no longer recommended to control Plutella xylostella.
3 Furui, Duoweiwei, Sukai and other high-efficiency pyrethroid pesticides or mixed with chlorpyrifos have a general control effect on Plutella xylostella. When the two insects are mixed and mainly Plutella xylostella, it should not be used.
4 According to the activity characteristics of Plutella xylostella, catch the morning or evening, focus on the heart leaf and leaf back spray to improve the control effect.
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