Effects of insecticides and defoliants applied alone and in combination for control of overwintering boll weevil(Anthonomus grandis; Coleoptera: Curculionidae)—laboratory and field studies
| Autor: | John W. Norman, Shoil M. Greenberg, Thomas W. Sappington, Gary W. Elzen, Alton N. Sparks |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Male
Insecticides Time Factors Thiophenes chemistry.chemical_compound Nitriles Pyrethrins Thiadiazoles Botany Animals Overwintering Boll weevil Gossypium Defoliants Chemical biology Phenylurea Compounds Organothiophosphates Defoliant Age Factors Agriculture Drug Synergism General Medicine Pesticide biology.organism_classification Coleoptera Cyhalothrin Horticulture Sulfonylurea Compounds chemistry Anthonomus Insect Science Curculionidae Azinphos-methyl Female Azinphosmethyl Laboratories Agronomy and Crop Science |
| Zdroj: | Pest Management Science. 60:849-858 |
| ISSN: | 1526-4998 1526-498X |
| DOI: | 10.1002/ps.878 |
| Popis: | In laboratory, greenhouse and field tests, we determined the effects of combining full rates of the defoliants tribufos and thidiazuron and the herbicide thifensulfuron-methyl with half rates of the insecticides lambda-cyhalothrin or azinphos-methyl, and the combination of tribufos and thidiazuron, both in half rates, on mortality of the boll weevil, Anthonomus grandis grandis Boheman and on the quality of defoliation. Tribufos, 0.47kgha −1 and tribufos, 0.235kgha −1 + thidiazuron, 0.125kgha −1 exhibited a slightly toxic effect to boll weevil, while tribufos, 0.47kgha −1 + lambda − cyhalothrin, 0.019kgha −1 ,t ribufos, 0.47kgha −1 + azinphos − methyl, 0.14kgha −1 , and tribufos, 0.235kgha −1 + thidiazuron, 0.125kgha −1 + azinphos − methyl, 0.14kgha −1 , provided control of boll weevil as good as or better than full-rate azinphos-methyl or lambda-cyhalothrin alone owing to synergistic effects. Thidiazuron or thifensulfuron-methyl alone or in combination with insecticides did not affect boll weevil mortality. Treatment with tribufos + thidiazuron, both at half rate, significantly increased defoliation compared to full rates of tribufos or thidiazuron alone, and provided adequate defoliation for approximately the same cost per hectare. Published in 2004 for SCI by John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text