Annual report of the Board of Control of the New York Agricultural Experiment Station . e spray should beused in liberal quantities and pains should be exercised to wetall portions of the tree, especially the fruit spurs and theunder sides of the young wood, where most of the eggs are laid. A third opportunity toSpraying for the strike hard at the psyllafirst-brood is when all of the eggsnymphs. have hatched and the youngnymphs are largely assem-bled in the axils of the young leaves andfruits. This occurs normally during thelatter part of the blossoming period andthe young insects can be reach
Annual report of the Board of Control of the New York Agricultural Experiment Station . e spray should beused in liberal quantities and pains should be exercised to wetall portions of the tree, especially the fruit spurs and theunder sides of the young wood, where most of the eggs are laid. A third opportunity toSpraying for the strike hard at the psyllafirst-brood is when all of the eggsnymphs. have hatched and the youngnymphs are largely assem-bled in the axils of the young leaves andfruits. This occurs normally during thelatter part of the blossoming period andthe young insects can be reached by sprayingjust as the blossoms drop. The most satis-factory spray /is tobacco extract, using three-fourths of a pint to one hundred gallonsof water to which are added from three tofive pounds of dissolved soap. (Formula 1.) The grower should endeavorLate summer to combat the pest by thespraying. preceding measures and thusavoid, if possible, the neces-sity of later spraying. If the trees are badly infested during thesummer time it is a very difficult task to bring the pest under. Fig. 24.—Too early formost effective psyllacontrol. New York Agricultural Expeeiment Station. 945 control as there is an intermingling of all stages of the insect,and some of them are resistant to any spraying mixtures which can safely be used on the leaves, especiallyajte: if the growth is heavy, seriously \i iim interfere with thorough treatment, and there is also danger thatfoliage injured by the psylla maybe further damaged by the appli-// cations of the sprays. Frequent and thorough spray-ing with the tobacco extract(Formula 1), on the first dis-covery of injurious numbers ofthe insects is the most satis-factory means of affording -Conditionsfof blossom clusters tecti0n to the trees. during the spraying for psylla nymphs. SPRAYING MIXTURES AND FORMULAS. Formula 1. Tobacco Extract. Tobacco extract (40 per ct. nicotine) f pt. Water 100 gals. Soap 3 to 5 lbs. Formul
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