. Bulletin of the Department of Agriculture. Agriculture; Agriculture. TWO LEAFHOPPEKS INJURIOUS TO APPLE NURSERY STOCK. points in the Province oi Ontario, from Mexico, Porto Rico, and Cor- rientes, Argentina. In the United States this species is widely dia seminated, doubtless due to the variety and abundance of its host plants. From speci- mens in the collection of the United States National Museum, and from the collec- tion, correspondence, and notes of the Bu- reau of Entomology, it appears to be pres- ent in almost every State in the Union. (See fig. 1.) It is found in greatest abund
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. TWO LEAFHOPPEKS INJURIOUS TO APPLE NURSERY STOCK. points in the Province oi Ontario, from Mexico, Porto Rico, and Cor- rientes, Argentina. In the United States this species is widely dia seminated, doubtless due to the variety and abundance of its host plants. From speci- mens in the collection of the United States National Museum, and from the collec- tion, correspondence, and notes of the Bu- reau of Entomology, it appears to be pres- ent in almost every State in the Union. (See fig. 1.) It is found in greatest abundance throughout the east- ern humid area of the Upper Austral Zone. FOOD PLANTS. The food plants of Empoasca mali (Le B.) are very numerous and varied. In nurseries this insect prefers apple but it also feeds in great abundance on Norway maple and various oaks. Among field crops it is partial to alfalfa, clover, potato, and beets, in about the order named. A list of all host plants reported, upon the majority of which the writer has noted this insect feeding, follows:. Fig. 1.—Distribution of the apple leafhopper {Empoasca mali) in the United States. Acer negundo, box-elder. Acer platanoides, Norway maple. Alihea rosea, holly hock Amygdalus persica, peach. Apium graveolens, celery. Avena sativa, oats. Beta vulgaris, beets. Betula sp., birch. Cannabis sativa, hemp. Castanea sp., chestnut. Corylus americana, hazelnut. Crataegus sp., hawthorn. Cydonia oblonga, quince. Dahlias])., dahlia. Gramineae, grasses. Hamamelis virginiana, witch-hazel. Hicoria pecan, pecan. Juglans nigra, black walnut. Juglans sp., walnut. Medicago sativa, alfalfa. Phaseolus vulgaris, beans. Populus sp., poplar. Prunvs virgianiana, choke-cherry. Prunus pissardi, ptu"ple-leaved plum. Prunus spp., cherries and plums. Pyrus baccata, Siberian crab. Pyrus communis, pear. Pyrus malus, apple. Quercus spp., oaks. Rheum, rhaponticum, rhubarb. Rhus cotinus, smoke-tree. Ribes oxyacanthoides, gooseberry. Ribes ru
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