Survey traps for parasitoids, and coccinellid predators of the citrus blackfly, aleurocanthus woglumi¹
1981
Dowell, Robert V. | Cherry, Ron H.
The attractiveness of sticky traps of eight colors for two parasitoids Amitus hesperidum Silvestri and Prospaltella opulenta Silvestri, and seven species of coccinellid predators of the citrus blackfly, Aleurocanthus woglumi Ashby (Homoptera: Aleyrodidae) was evaluated in insectory and field tests. Yellow traps captured significantly more parasitoids and coccinellids than other colors tested; captures were greatest in traps placed in the lower half of citrus trees. These traps can be used to survey for and monitor the population trends of the citrus blackfly and its natural enemies. Since the successful implementation of biological control of the citrus blackfly, Aleurocanthus woglumi, in Florida (Dowell et al., 1979a) and Texas (Ketner & Rosier, 1978), increased emphasis has been placed on acquiring information useful in approaches to the management of this pest. Survey techniques for A. woglumi have been developed in groves (Hart et al., 1978) and urban areas (Dowell & Cherry, 1980), and information obtained on the impact of several pesticides on predators and parasitoids of this pest (Fitzpatrick et al., 1978). Traps have been devised and used for monitoring changes in citrus blackfly numbers (Harlan et al., 1979, Hart et al., 1978, Dowell et al., 1979b, Meyerdirk et al., 1979, Fitzpatrick et al., 1979) but no equivalent system exists for estimating the abundance of predators or parasitoids of this pest. This information is needed in pest management programs to monitor population levels of the pest and its natural enemies, to time insecticide sprays for maximal pest control with minimal damage to beneficial insects and to aid in the survey for citrus blackfly and its parasitoids throughout the state. Here we present the results of tests with sticky traps to survey and monitor both parasitoids and predators of the citrus blackfly.
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