College of Agricultural, Food, and Environmental Sciences
Wine and Viticulture
BS in Wine and Viticulture
Michael Costello, PhD
Control of vine mealybug in vineyard systems is of critical importance due to economic injury potential including an ability to vector virus. Traditional management of this pest has relied heavily upon the use of systemic and contact insecticides. The systemic insecticide MoventoÒ, registered for vine mealybug and active ingredient spirotetramat, has been shown to be compatible with biological control. However potential side effects of chemical controls on beneficial insect populations is known to affect non target arthropods. This study examined the effect of the systemic insecticide spirotetramat on populations of adult parasitic wasps, Anagyrus psuedococci, at two concentrations with wasps introduced onto treated leaves four hours and five days after application. Results of this study confirmed published reports spirotetramat did not cause a significant difference in wasp mortality concentration treatments or introduction interval treatments, and the interaction between concentration and interval was not found to be statistically significant. Lack of chemical ingestion combined with evolutionary characteristics of parasitic wasps may provide explanation to why a lipid synthesis inhibiting insecticides bear no adverse effect and warrants further investigation.
Available for download on Friday, December 13, 2019