ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
INFLUENCE OF GLYPHOSATE-TRIMESIUM AND PIRIMICARB, ON PREDATOR POPULATIONS |
| Authors: | Dr. Marian MYSLICKI, Kurt H.A. FOLTIN |
| DOI: | 10.17660/ActaHortic.1996.422.101 |
| Abstract:
AVANS is a non-selective systemic herbicide for total weed control in orchards, vineyards, berrycrops and non-crop areas. It's active ingredient glyphosate trimesium is rapidly absorbed by leaves and translocated into roots and rhizoms. Glyphosate trimesium interferes the synthesis of aromatic aminoacids. AVANS is very effective for control of annual and perennial mono- and dicotyledonous weeds in topfruits grown under IPM conditions. Toxicity of glyphosate trimesium to beneficial arthropods: In laboratory tests glyphosate trimesium 480 g/l SL formulation AVANS was tested on 2 beneficial arthropods, the carabid beetle Pterostichus melanarius and a Pardosa spider. The maximum single application rate (7.5 l/ha or 3.6 kg ai/ha) was applied to the beetles/spiders and the soil surface, while the maximum total annual application rate (15 l/ha or 7.2 kg ai/ha) was applied to the soil surface only in order to simulate worst case residual exposure from successive applications in one season. Dimethoate was applied at 700 g ai/ha to the test animals as a standard. The carabid beetles showed an increase in mortality (27%) only in case with the residual plus direct contact application, but this was not found with the residual application. Both treatments had no significant effect (p=0.05), on lycosid spiders. Eating activity for both species was not significantly reduced when compared to the controls. According to the IOBC Classification Scheme the glyphosate trimesium 480 G/l SL formulation AVANS may be regarded as "harmless" (category 1,<30% mortality), and is not expected to cause any adverse effects to carabid beetles or lycosid spiders under conditions of normal field use. | |
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