Predictive Year-end California Red Scale (Homoptera: Diaspididae) Orange Fruit Infestations Based on Catches of Males in the San Joaquin Valley
Authors: Moreno, Daniel S.; Kennett, Charles E.
Source: Journal of Economic Entomology, Volume 78, Number 1, February 1985 , pp. 1-9(9)
Publisher: Entomological Society of America
Abstract:Aonidiella aurantii (Maskell) infestations on 'Navel' and 'Valencia' orange fruit at the end of the calendar year were successfully predicted in the San Joaquin Valley based on data developed from catches of male scales in traps, female scales on twigs, and fruit infestations. Fruit infestations at harvest were regressed on the number of males trapped in the first, second, or fourth male scale flights or on the number of adult females on twigs. The equation that best explained the percentage of infested fruit as a function of male catches was a polynomial of the second degree. If the number of trapped males is known for the first, second, or fourth flights, the percentage of fruit infestation (≥1 scale per fruit) at the end of the season can be predicted. By regressing the percentage of fruit with ≥1 scale on that with ≥11 scales per fruit, a direct relationship to the flights was established. The citriculturist can select an acceptable action threshold by either recording total fruits with ≥:1 scale or patchy fruits with ≥:11 scales. Thus, the red scale pheromone trap can be incorporated as a valuable tool in the management of red scale populations.
Document Type: Research article
Publication date: 1985-02-01
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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