. California greenhouse pests and their control. Insect pests; Greenhouse plants. Fig. 37. The false Florida red scale on aspi- distra. Boisduval scale, Diaspis boisduvalii Signoret. The shield of the female is more or less circular, flat, thin, whitish, and with the nipple more or less central. Shield of the male is small, elongate, white, bearing three ridges, and with nipple terminal. The males are found commonly clustered together in a cottony mass. Cattleya and cymbidium serve as the most common hosts, although other orchids and certain tropical plants may be attacked. This spe- cies ofte
. California greenhouse pests and their control. Insect pests; Greenhouse plants. Fig. 37. The false Florida red scale on aspi- distra. Boisduval scale, Diaspis boisduvalii Signoret. The shield of the female is more or less circular, flat, thin, whitish, and with the nipple more or less central. Shield of the male is small, elongate, white, bearing three ridges, and with nipple terminal. The males are found commonly clustered together in a cottony mass. Cattleya and cymbidium serve as the most common hosts, although other orchids and certain tropical plants may be attacked. This spe- cies often encrusts the stems, and heavily infested leaves turn yellow and die. Aspidistra scale (fern scale), Pinnaspis aspidistrae (Signoret). The shield of the female is brown, broadly oystershell- shaped with terminal nipple. Male shield is small, elongate, and felted white. This is a common greenhouse pest, occurring on a wide variety of plants but particu- larly aspidistra and ferns. Other Species Found In California Greenhouses Cyanophyllum scale, Hemiberlesia cyano- phylli (Signoret), closely resembles the ivy scale. It is often found in greenhouses, but also occurs outdoors in southern California. A large number of tropical plants may be infested. Latania scale, Hemiberlesia lataniae (Sig- noret), closely resembles the ivy scale, except the female shield is evenly and strongly convex and the body of the insect usually remains in the shield when it is removed. It is sometimes abundant on palms, but a wide variety of other plants are attacked. Greedy scale, Hemiberlesia rapax (Corn- stock) , resembles the ivy scale except the female shield is strongly convex with the apex of the hump off to one side. Primarily a greenhouse pest in many parts of the United States, but found more commonly outdoors in California. It occurs on a wide variety of woody ornamental plants, chiefly infesting the stems and particu- larly the axils of the leaves and bases of the buds. Dictyospermum scale (S
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