Screening and Sensitivity of Pesticides for Controlling New Invasive Pest Paracoccus marginatus on Papaya Plants
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摘要:
目的 木瓜秀粉蚧Paracoccus marginatus Williams and Granara de Willink是我国一种重要的新入侵害虫,为筛选出防治木瓜秀粉蚧的高效药剂,明确其对不同杀虫剂的敏感性。 方法 采用浸叶法测定了2龄若虫和雌成虫对15种常用杀虫剂的敏感性。 结果 从15种药剂中筛选出5种对木瓜秀粉蚧毒力较高的杀虫剂,分别为25 g·L−1高效氯氟氰菊酯乳油、10%虫螨腈悬浮剂、4.5%高效氯氰菊酯乳油、15%哒螨灵水乳剂和15%唑虫酰胺悬浮剂;其中,25 g·L−1高效氯氟氰菊酯乳油对木瓜秀粉蚧的致死中浓度(LC50)最小,2龄若虫和雌成虫的致死中浓度LC50分别为0.243 0 、0.782 1 mg·L−1,其次为10%虫螨腈悬浮剂、4.5%高效氯氰菊酯乳油和15%哒螨灵水乳剂,15%唑虫酰胺悬浮剂的LC50值最大;木瓜秀粉蚧2龄若虫对药剂的敏感性明显高于雌成虫。 结论 就生物活性测定而言,在木瓜秀粉蚧爆发时,可选用25 g·L−1高效氯氟氰菊酯乳油、10%虫螨腈悬浮剂、4.5%高效氯氰菊酯乳油、15%哒螨灵水乳剂和15%唑虫酰胺悬浮剂作为当前防治木瓜秀粉蚧的主要防治药剂,可有效遏制入侵害虫木瓜秀粉蚧的危害。 Abstract:Objective Tests to screen and determine sensitivities of insecticides for controlling Paracoccus marginatus Williams and Granara DE Willink, an important new invasive pest on papaya plants in China, were conducted. Method The sensitivities of 2nd nymphs and female adults of P. marginatus to 15 insecticides were determined by means of leaf immersion for pesticide selection. Result Five applications of pesticides including 25 g·L−1L lambda-cyhalothrin SC, 10% chlorfenapyr SC, 4.5% beta-cypermethrin EC, 15% pyridaben EW, and 15% tolfenpyrad SC with high toxicity to P. marginatus were selected for further evaluation. Among them, the lethal medium concentration (LC50) of 25 g·L−1 lambda-cyhalothrin SC was the lowest with LC50 on the 2nd nymphs and female adults being 0.243 0 mg·L−1 and 0.782 1 mg·L−1, respectively. It was followed by 10% chlorfenapyr SC, 4.5% beta-cypermethrin EC, 15% pyridaben EW and 15% tolfenpyrad SC in that order. The 2nd nymphs were significantly more sensitive to the insecticides than the female adults. Conclusion It appeared that 25 g·L−1 lambda-cyhalothrin SC, 10% chlorfenapyr SC, 4.5% beta-cypermethrin EC, 15% pyridaben EW or 15% tolfenpyrad SC could be used to control or prevent a P. marginatus outbreak. -
Key words:
- new invasive pest /
- Paracoccus marginatus /
- pesticides /
- sensitivity determination
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表 1 供试药剂及生产厂家
Table 1. Tested pesticides and their manufacturers
序号
No.药剂名称
Pesticides生产厂家
Manufacturers1 350 g·L−1吡虫啉悬浮剂
350 g·L−1 imidacloprid SC江苏龙灯化学有限公司
Jiangsu Rotam Chemistry Co., Ltd.2 5%啶虫脒乳油
5% acetamiprid EC江苏龙灯化学有限公司
Jiangsu Rotam Chemistry Co., Ltd.3 20%呋虫胺可溶粒剂
20% dinotefuran SG日本三井化学
AGRO株式会社
Mitsui Chemicals, Inc.4 15%哒螨灵水乳剂
15% pyridaben EW海南正业中农高科股份有限公司
Hainan Zhongzheng High Technology Co., Ltd.5 10%虫螨腈悬浮剂
10% chlorfenapyr SC巴斯夫植物保护(江苏)有限公司
Basf(China)Co., Ltd.6 15%唑虫酰胺悬浮剂
15% tolfenpyrad SC福建省德盛农药有限公司
Fujian Desheng Pesticide Co., Ltd.7 4.5%高效氯氰菊酯乳油
4.5%beta-cypermethrin EC河北威远生物化工有限公司
Hebei Veyong Bio-chemical Co., Ltd.8 25 g·L−1高效氯氟氰菊酯乳油
25 g·L−1 lambda-cyhalothrin EC先正达南通作物保护有限公司
Syngenta Nantong Crop Protection Co., Ltd.9 25 g·L−1溴氰菊酯乳油
25 g·L−1 deltamethrin EC拜耳作物科学(中国)有限公司
Bayer CropScience(China)Co., Ltd.10 22.4%螺虫乙酯悬浮剂
22.4% spirotetramat SC拜耳作物科学(中国)有限公司
Bayer CropScience(China)Co., Ltd.11 240 g·L−1螺螨酯悬浮剂
240 g·L−1 spirodiclofen SC拜耳作物科学(中国)有限公司
Bayer CropScience(China)Co., Ltd.12 22%氟啶虫胺腈悬浮剂
22% sulfoxaflor SC陶氏益农(中国)有限公司
Dow Agrosciences China Co., Ltd.13 60 g·L−1乙基多杀菌素悬浮剂
60 g·L−1 spinetoram SC陶氏益农(中国)有限公司
Dow Agrosciences China Co., Ltd.14 200 g·L−1氯虫苯甲酰胺悬浮剂
200 g·L−1 chlorantraniliprole SC陶氏益农(中国)有限公司
Dow Agrosciences China Co., Ltd.15 25%噻虫嗪水分散粒剂
25% thiamethoxam WG北京华戎生物激素厂
Beijing Huarong Biological Hormone Plant Co., Ltd.表 2 木瓜秀粉蚧2龄若虫对5种杀虫剂的敏感性
Table 2. Pesticide sensitivities of 2nd-instar P. marginatus nymphs to 5 insecticides
药剂
Pesticides试虫数
Number of insect致死中浓度
LC50/(mg·L−1)95%置信限
95% Confidence interval斜率±标准误
Slope±SE卡方(自由度)
χ2(df)25 g·L−1高效氯氟氰菊酯乳油
25 g·L−1 lambda-cyhalothrin EC489 0.243 0 0.142 4~0.402 6 0.58±0.07 0.54(3) 10%虫螨腈悬浮剂
10% chlorfenapyr SC900 11.64 10.09~13.34 1.63±0.11 11.87(4) 4.5%高效氯氰菊酯乳油
4.5% beta-cypermethrin EC729 41.73 28.25~75.26 0.79±0.12 2.40(4) 15%哒螨灵水乳剂
15% pyridaben EW822 44.95 35.45~55.18 1.29±0.11 7.40(5) 15%唑虫酰胺悬浮剂
15% tolfenpyrad SC874 120.3 85.65~170.6 0.71±0.10 1.84(4) 表 3 木瓜秀粉蚧雌成虫对5种杀虫剂的敏感性
Table 3. Pesticide sensitivities of female P. marginatus adults to 5 insecticides
药剂
Pesticides试虫数
Number of insects致死中浓度
LC50/(mg·L−1)95%置信限
95% Confidence interval斜率±标准误
Slope±SE卡方(自由度)
χ2(df)25 g·L−1高效氯氟氰菊酯乳油
25 g·L−1 lambda-cyhalothrin EC614 0.782 1 0.511 4~1.214 3 0.64±0.06 1.68(4) 10%虫螨腈悬浮剂
10% chlorfenapyr SC751 24.83 20.67~30.11 1.35±0.10 9.10(5) 4.5%高效氯氰菊酯乳油
4.5% beta-cypermethrin EC792 57.77 39.40~103.2 0.96±0.13 2.45(4) 15%哒螨灵水乳剂
15% pyridaben EW921 67.70 54.31~83.63 1.03±0.08 4.29(5) 15%唑虫酰胺悬浮剂
15% tolfenpyrad SC814 173.5 129.2~247.2 0.83±0.11 1.08(4) -
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