The Citrophilus Mealybug, Pseudococcus Gahani Green, As A Major Pest of Citrus In Southern California
Author: ARMITAGE, H. M.
Source: Journal of Economic Entomology, Volume 17, Number 5, October 1924 , pp. 554-562(9)
Publisher: Entomological Society of America
Abstract:The citrophilus mealybug (Pseudococcus gahani Green) first found in the citrus orchards of Southern California at Uplands, San Bernardino County in 1913, is now established in all of the southern citrus producing counties with the exception of San Diego and Imperial. In Los Angeles, Orange, San Bernardino and Riverside Counties, it occurs over a rather large acreage. In Ventura and Santa Barbara Counties the infestations are new and as yet are confined to a limited acreage though none the less severe in degree of infestation. Due to adverse climatic conditions this species of mealybug has proven less serious in the interior counties as San Bernardino and Riverside and while the spread has continued the infestations have been exceedingly light since the date of the original outbreak. In the coast counties the spread has been rapid and the infestations as a whole very heavy. The citrophilus mealybug is particularly resistant to fumigation and has the usual resistance of this group of insects to sprays. Water under pressure during the peak of oviposition period in the spring is by far the most successful means of mechanical control. Natural enemies of which there are several native species present in the orchards are an important factor of control. The ladybird beetle, Cryptolaemus montrouzieri Muls.,an introduced predator, is particularly effective. Eight county and Association insectaries in Southern California are producing and liberating monthly over half a million of these beetles, throughout the infested areas of Southern California. Where they are made available in quantity early in the year they are being used successfully as a control measure.
Document Type: Research Article
Publication date: October 1, 1924
- 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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