ILLUSTRATIONS. 



PLATES. 



Page. 



Plate I. Fig. 1. — Cover crop of vetch in vineyard of Mr. John Higgins, North 



East, Pa. Fig. 2. — Cover crop of turnips in vineyard of Mottier 



Bros., North East, Pa.; vineyard badly infested by grape leafhop- 



per, which was effectively treated with blackleaf tobacco-extract 



spray 8 



II. Fig 1. — Injury by grape leafhopper (Typhlocyba comes) to unsprayed 

 vines. Fig. 2. — Perfect foliage of sprayed vines. Views from ex- 

 perimental plats in vineyard of Mr. H. H. Harper, at North East, 

 Pa 10 



III. General view of the Whitman pear orchard, with power-spraying 



outfit in operation in spraying experiments against codling moth, 

 Concord, Cal., 1909 , 42 



IV. Injury by rose-chafer ( Macrodactylus subspinosus) to fruit on un- 



sprayed grapevine in the vineyard of Mr. C. F. Hirt, at North 



East, Pa 60 



V. The protection afforded by spraying; vine from row adjoining the 



unsprayed vine shown in Plate IV 60 



VI. Injury by rose-chafer to fruit on unsprayed grapevine in the vineyard 



of Mr. George Cook, at North East, Pa 60 



VII. Protection afforded by spraying; vine from vineyard of Prospect 

 Park Fruit Farms Co., adjoining vineyard of Mr. George Cook, 



North East, Pa 60 



VIII. The California peach borer (Sanninodea opalescens). Apricot 



orchard, showing trees injured and killed by the borer 68 



IX. The California peach borer. Rearing cages in laboratory yard at 



San Jose, Cal. used in study of its life history 80 



X. The California peach borer. Fig. 1. — Base of apricot tree, show- 

 ing injury by larvae. Fig. 2.— Wire cage, used in determining 



period of emergence of moths, in place around tree 80 



XI. Peach leaves showing work of peach and plum slug (Caliroa [Erio- 



campoides] amygdalina) 92 



XII. Injury about two weeks old to peach shoots by the peach bud mite 



( Tarsoncmus waitei) 104 



XIII. Injury several weeks old to peach shoots by the peach bud mite 108 



XIV. Showing condition of peach nursery trees in the fall, due to injury 



by the peach bud mite. 110 



XV. Showing condition of peach nursery trees in the fall, due to injury 



by the peach bud mite 112 



XVI. Injury to buds supposedly due to the peach bud mite 112 



XVII. Grape canes showing infestation by the grape scale. Aspidiotus 



(Diaspidotus) uvx 116 



IX 



