. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. 162 Insect Pests. AVye Colle-e, and these bore out what :\Ir. Chapman had found; check trees in both cases ' kept. Still more definite results were obtained by :\Ir. .T. H. W. Best of Suckley, and Mr. :\Iontasue Taylor of Shelsley Walsh, and :Mr. :\Iartin of the Toddington Fruit Grounds, crops of apples being obtained by the former, for the first time for many rears, on the treated trees, while the rest of the plantations suffered as usual. AVhere failures hav
. The insect and other allied pests of orchard, bush and hothouse fruits and their prevention and treatment . Insect pests; Fruit. 162 Insect Pests. AVye Colle-e, and these bore out what :\Ir. Chapman had found; check trees in both cases ' kept. Still more definite results were obtained by :\Ir. .T. H. W. Best of Suckley, and Mr. :\Iontasue Taylor of Shelsley Walsh, and :Mr. :\Iartin of the Toddington Fruit Grounds, crops of apples being obtained by the former, for the first time for many rears, on the treated trees, while the rest of the plantations suffered as usual. AVhere failures have taken place such as recorded liy ;\Ir. Spencer Pickering (10), ami notified to me hj ^Ir. Harnett of Sittingbourne, the cause was probably be- cause the wash was irot put on thick enough.* The wash does not do any such impossible thing as corrode the etrg-shells, it acts as far as I can see as a mechanical barrier to the escape of a very large number of the young. At the same time it is possible that the salt has some osmotic power, for \\'here the quantity of salt is increased the action becomes greater. Observers have noticed that when trees are thus treated the Psylla ova assume a dull leaden hue, and this still further points to some change taking place in the o\'a. The addition of waterglass is to prevent the wash from flaking off. ilany suli- stances liave been tried for this purpose, both by j\Ir. Spencer Pickering and myself, and the same results have been attained; waterglass or paraffin being the only substances found to do good in this respect. The latter, however, I found niucli inferior to the former. Spraying when the suckers are in the trusses of the blossom may do a little good if the blossoms are hit fairly hard so as to drive the liquid in, but this may do some harm, and Imt few are actually toucJied by the spray owing to their waxy and threadv coverin.' FIG. 135.—SENECA XOZZLES USEIi Foil LIME ,IMI SALT WASH. A, set for siiiayiiig. B, oiienert to liluw
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectpests, bookyear
