. Manual of fruit insects. ted andthe beetles are present in thespring they may be poisoned byspraying the swelling buds verythoroughly with a strong arsenicalmixture, or the beetles may bejarred into pans containing alittle kerosene or on to sheets sat-urated with oil. The work of col-lecting the beetles must be donein the warmer part of brightsunny days while the beetles aremost active, for in the cold rawweather it is hard to find alarmed the beetles feigndeath and drop at the slightestjar. Shaking the vines or jarringthe trellis will cause them to fall for some distance along the
. Manual of fruit insects. ted andthe beetles are present in thespring they may be poisoned byspraying the swelling buds verythoroughly with a strong arsenicalmixture, or the beetles may bejarred into pans containing alittle kerosene or on to sheets sat-urated with oil. The work of col-lecting the beetles must be donein the warmer part of brightsunny days while the beetles aremost active, for in the cold rawweather it is hard to find alarmed the beetles feigndeath and drop at the slightestjar. Shaking the vines or jarringthe trellis will cause them to fall for some distance along therow. For this reason we have found it most satisfactory tocollect the beetles in a small pan containing a little kerosene bytapping the canes, on which they are feeding, lightly with asmall stick. As a rule the grape-vine flea-beetle is mosttroublesome in vineyards adjoining woodlots, hedgerows orwaste land in which the beetles find suitable hibernating practicable all such conditions should be Fig. 352. — Pupa of the grape-vine flea-beetle. Enlarged. ReferencesComstock, Rept. as U. S. Ent., pp. 213-216. Agr. Exp. Sta. Bull. 157. Y. (Geneva) Agr. Exp. Sta. Bull. 331, pp. 494-514. 1910. 408 FRUIT INSECTS The Grape Leaf-hopper Typhlocyha comes Say The grape leaf-hopper is our most common and widespreadinsect pest of the grape-vine. Practically every vineyard inthe United States and Canada is infested by the insect, and
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