Citrus Blackfly Control on Nursery Citrus, 1990

Talstar, Dursban, and Orthene were compared to petroleum oil (Sunspray 6 N) for efficacy against CBF on container grown citrus in a nursery at Monte Alto, Tex. CBF-infested trees, 3-4 ft tall, were selected and each treatment replicated 4 times on groups of 5 trees each. Trees were sprayed to foliar runoff, with control trees receiving a water spray, using a TQ-40 Koke Kap backpack COa Sprayer at 30 psi. At intervals prespray and postspray, mature young leaves (20/treatment) were randomly sampled and lst-4th stage CBF (minimum of 500/ treatment) were examined under a binocular microscope. CBF were recorded as dead by the absence of body fluid when probed with a needle. Percent mortality of all immature stage CBF was determined for each treatment.