Comstock's Mealy bug on Apple and Catalpa

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Abstract
Pseudo-coccus comstocki attacks a wide range of host plants but in Virginia is a pest of apple and catalpa only. It has been known as a pest of catalpa since 1923 and was first found causing damage to apple in 1934. It is now a pest in many orchards in some of the principal apple-growing regions of Virginia. Heaviest infestations were found in commercial orchards that had been thoroughly sprayed and had received annual applications of fertilizer. In adjoining or- chards that were not fertilized and had received only 1 or 2 arsenical sprays, a few mealybugs were present but they did not cause any injury to the fruit. The following spp. of parasites were reared from Comstock''s mealybug: Clausenia purpurea, Thysanus nigra, T. elongatus, Pachyneuron alti-scuta, and Lygocerus sp. C. purpurea was the most important parasite reared.

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