Annual report of the Board of Control of the New York Agricultural Experiment Station . 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 sp
Annual report of the Board of Control of the New York Agricultural Experiment Station . 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. Formula 2. Fish-oil Soap. Fish-oil soap 20 lbs. Water 100 These are recommended for fall or spring spraying to destroy the flies. Formula 3. Miscible Oil. Miscible oil 7-8 gals. Water 100 gals. This is a rather dangerous spray and should be used only in thespring as buds are swelling and never after buds begin to show greenat the tips. Formula 4. Lime-Sulphur Mixture. Lime-sulphur solution (32°-34° B.) 1 gal. Water 8to9 gals. To be applied just as the blossom cluster-buds separate at the tipsto destroy psylla eggs about to hatch and newly-emerged nymphs. 60 TREE CRICKETS OF GARDEN AND ORCHARD * F. H. HALL. Undoubtedly many country folk have heard, duringInsect the sultry nights of late summer, the shrill, musicalsongsters. trills, or songs, of tree crickets; but probably onlya limited number of nature students have more thanwondered who the singers might be. Few persons, indeed, have seenmany tree crickets and fewer still realize that there are severalspecies of these interesting lit
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