. Apple wächst in den pazifischen Nordwesten; eine Kondensation von Vorlesungen, Experimenten und Diskussionen. ia. und dann an die Motten. Xowin allgemein w (> kann sagen, es wird unter der Rinde bleiben, dependingupon die klimatischen Bedingungen, die bis Ende Februar oder möglicherweise untilApril I. dann die Larve Änderungen aus der Puppe zu einem ruhenden Form inwhich es für eine variable Länge von Zeit bleibt, je n] Ion climaticconditions, aber (ui Die durchschnittliche über foui-Wochen und llien forththe Motte gibt. Ciran wird nie einer auf der Außenseite des h finden; ii-k. {Heywill gehen immer uiidei -] Uotected vom in

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. Apple growing in the Pacific Northwest; a condensation of lectures, experiments and discussions. ia. and then to the moth. Xowin a general way w(> may say it will remain under the bark, dependingupon the climatic conditions, until late in February or possibly untilApril I. Then the larva changes from the pupa to a quiescent form inwhich it remains for a variable length of time, depending n]ion climaticconditions, but (ui the average about foui- weeks, and llien gives forththe moth. Vou will never find one on the outside of the h;ii-k. {heywill always go uiidei- to be ]Uotected from the inclemencies of theweather. in some niiacconntahle way. 1 supi):ise we entomolouists are i-e-sponsible for the belief that there is a. direct relation between the timeAvhen these moths appear and the time Avlien the spray pump should bestarted. AVe shall see later th.it this is not true. These moths nuiybegin to appear as early as A|iril in. and they continue to appear up to THE CODLIXO JIOTII 139. Young- apple orchard, Yakima Valley. Washington. as late as the 10th of July. Hence it is that the relation between theappearance of the moth and the time of starting the spray pump is nota close one, for early moths in this state, that is, those which come cutduring the cold, rainy weather of spring, usually die without deposit-ing eggs. It is only the later ones that are of any interest to us from aneconomic standpoint. These which emerge from the 15th of June to the15th of July deposit eggs. Rather than one should pay any attention tothe time at which the moths appear, I would suggest that it would be agood plan for every orchardist. if possible, to become accpiainted withthe eggs of these insects and learn when they are deposited in theirparticular locality. No one can tell you, because it varies with theseasons and with the particular location of the orchard. At Cor-vallis these eggs are deposited ordinarily not much before the 25thof June, and from then on to possibly the middle

Stockbilder mithilfe von Tags suchen

• bookcentury1900
• bookdecade1910
• booksubjectapples
• bookyear1911