Pivonia, S. and Steinberg, S.
Western flower thrips (WFT) are a primary pest of greenhouse crops worldwide. In organic and IPM control practices, frequently Orius spp. are used. However, Orius spp. are relatively expensive to produce. In these trials we released Orius laevigatus at different rates with or without the predatory mite, Amblyseius swirskii. Treatment for powdery mildew was with liquid sulfur. There was no statistical difference in the number of O. laevigatus recovered from tunnels in which 2 or 6 individuals were released per m2, and there was no difference in thrips control between any of the releases with O. laevigatus, strongly suggesting that fewer O. laevigatus individuals could be released and still maintain effective WFT control. Thrips populations in tunnels with only A. swirskii were intermediate between non-treated control tunnels and the tunnels in which O. laevigatus were released. Furthermore liquid sulfur, used to control powdery mildew, did not adversey affect the predators.
Pivonia, S. and Steinberg, S.
Western flower thrips (WFT) are a primary pest of greenhouse crops worldwide. In organic and IPM control practices, frequently Orius spp. are used. However, Orius spp. are relatively expensive to produce. In these trials we released Orius laevigatus at different rates with or without the predatory mite, Amblyseius swirskii. Treatment for powdery mildew was with liquid sulfur. There was no statistical difference in the number of O. laevigatus recovered from tunnels in which 2 or 6 individuals were released per m2, and there was no difference in thrips control between any of the releases with O. laevigatus, strongly suggesting that fewer O. laevigatus individuals could be released and still maintain effective WFT control. Thrips populations in tunnels with only A. swirskii were intermediate between non-treated control tunnels and the tunnels in which O. laevigatus were released. Furthermore liquid sulfur, used to control powdery mildew, did not adversey affect the predators.