ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
RELATIVITY OF THE TOXICITY OF BROAD SPECTRUM INSECTICIDES TOWARDS THE PREDATORY MITE, TYPHLODROMUS PYRI (OUDEMANS). |
| Author: | D. Bylemans |
| Abstract:
The selectivity of insecticides and fungicides towards the predatory mite, Typhlodromus pyri (Oudemans), is in many countries a major criterion to consider whether a plant protection product can be used in integrated pest management of pome fruits. This selectivity can be tested by means of lab-tests, semi-field or field tests. All test methods have their own disadvantages. Differences in sensitivity of local strains, the time of application, the time of assessment and many other parameters have important effects on the final toxicity on this beneficial if field tests are used. However, too many information resulting from field tests can not be obtained by lab testing. Therefore, both results should be carefully compared. Finally, attention is drawn to the possibilities for the management of pests that are very difficult to control with selective compounds. Short and long term effects of less selective compounds are considered to reduce the side effect on the population of Typhlodromus pyri as much as possible, if they are used in “emergency” situations. | |
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