Locomotory behaviour of the seven-spotted ladybird, Coccinella septempunctata, in response to five commonly used insecticides
| Autor: | A. Blackwell, KA Evans, D.G. Thornham, M.E. Wakefield, Keith F. A. Walters |
|---|---|
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Annals of Applied Biology. 152:349-359 |
| ISSN: | 1744-7348 0003-4746 |
| Popis: | Coccinella septempunctata is known to actively avoid substrates treated with an insecticide containing the organophosphate dimethoate. This study examines the responses of C. septempunctata to a range of different insecticide products from three chemical classes, carbamates, organophosphates and pyrethroids. Five formulated product insecticides were compared with the active ingredients (AIs) at two different application rates and using two different spray patterns (conferring choice or no-choice designs) in a randomised block design. Coccinellids' responses differed between insecticide classes. Pyrethoid treatments significantly reduced locomotion. Organophosphates effected mixed locomotory responses, as found in previous studies. Carbamate treatments effected very few changes in locomotory activity. Similar results were found at both application rates tested and under different test designs. The results of the AI tests indicated that different components of the products were responsible for the different reactions, with the AIs being responsible for some responses but the carriers being responsible for others. Results are discussed in relation to the insecticides' modes of action and to their potential to increase the efficiency of integrated aphid control. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|