Proceedings of the New Zealand Weed and Pest Control Conference

activity adults Agricultural aphid appeared application areas assessed atrazine Auckland autumn barley grass beetle caused chemical clover compared crop cultivars damage DISCUSSION disease early effect emergence established experiment field four fruit further gave grass grub growth Hamilton harvest herbicides higher important increased indicated infestation insect insecticides INTRODUCTION kg/ha larvae leaf leaves less lucerne maize major mean measured method mite months N.Z. Weed North numbers obtained occurred pasture period Pest Control Conf plants plots population present Proc production rates recorded reduced REFERENCES replicates reported Research residual resistant root ryegrass samples season seed seedlings selected showed shown significant significantly similar soil sowing sown species spray spring stage standard stem studies Summary summer Table tested treated treatments trees trials untreated Weed and Pest weed control weeks weevil weight winter yield Zealand