Insecticidal efficacy of three vegetable oils as post-harvest grain protectants of stored wheat against Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) |
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作者姓名: | AMIN NIKPAY |
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作者单位: | Department of Entomology, College of Agriculture, Urmia University, Urmia, Iran |
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基金项目: | Acknowledgments I would like to thank Abdoreza Niekmanesh for his statistical advice. I am also grateful to Prof Dr Dany 0beng-ofori for his constructive comments. |
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摘 要: | The lesser grain borer, Rhyzopertha dominica is a major insect pests of stored grain in the tropics. Vegetable oils (chamomile, sweet almond and coconut) at 2.5, 3.5, 5.0, 7.0 and 10.0 mL/kg were tested against Rhyzopertha dominica (F.) in wheat grain. All bioassays were conductr, d at 30℃ and 65% + 2% RH. Treatments with vegetable oils at high dose (10.0 mL/kg) achieved over 95% control within 24 h of exposure to freshly treated grain, There was little difference between the three oils in their effect. Persistence of oils in grains was tested at short-term storage intervals (48, 72 and 96 h) and intermediate-term intervals (10, 20 and 30 days) after treatments. The activity of all products decreased with storage period. Seed viability was reduced by the high dose rate (10.0 mL/kg) of oil treatments. The potential use of vegetable oils as supplementary or alternative grain protectants against insect damage in traditional grain storage in developing countries is discussed.
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关 键 词: | 仓储小麦 谷蠹 蛀虫 收获后谷物保护剂 植物精油 杀虫效果 |
修稿时间: | 2006-12-27 |
Insecticidal efficacy of three vegetable oils as post-harvest grain protectants of stored wheat against Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) |
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Authors: | AMIN NIKPAY |
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Institution: | Department of Entomology, College of Agriculture, Urmia University, Urmia, Iran |
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Abstract: | The lesser grain borer, Rhyzopertha dominica is a major insect pests of stored grain in the tropics. Vegetable oils (chamomile, sweet almond and coconut) at 2.5, 3.5, 5.0, 7.0 and 10.0 mL/kg were tested against Rhyzopertha dominica (F.) in wheat grain. All bioassays were conducted at 30°C and 65%± 2% RH. Treatments with vegetable oils at high dose (10.0 mL/kg) achieved over 95% control within 24 h of exposure to freshly treated grain. There was little difference between the three oils in their effect. Persistence of oils in grains was tested at short‐term storage intervals (48, 72 and 96 h) and intermediate‐term intervals (10, 20 and 30 days) after treatments. The activity of all products decreased with storage period. Seed viability was reduced by the high dose rate (10.0 mL/kg) of oil treatments. The potential use of vegetable oils as supplementary or alternative grain protectants against insect damage in traditional grain storage in developing countries is discussed. |
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Keywords: | Rhyzopertha dominica seed viability traditional grain storage tropics vegetable oils |
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