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|Posté le: Dim 9 Juil - 15:44 (2017) Sujet du message: The Southern Planter Vol 44 Devoted To Agriculture Hortic
Excerpt from The Southern Planter, Vol. 44: Devoted to Agriculture, Horticulture, Live Stock and the Household; April, 1883
On the: 9th Of October I first discovered the eggs on a piece of Lawlor, or ﬂy proof wheat, which had been sown as early as the zad September. The plants, at that time, generally had three leaves and there seemed to be a manifest preference m the flies to place their eggs on the second or middle blade, but they were found indiscriminately scattered upon the surface of this leaf from half an inch to three inches from its point of con tact with the central shoot. In several instances as many as forty eggs were counted by the aid of a glass on a single blade.
Particular eggs which were identified from day to day until they hatched, were found to remain upon the leaf - the shortest period of time five days, the longest seven How long they had been deposited when they were first observed, is uncertain, but it is presumed some days, as the ﬂies appeared 1n numbers out of all proportion, small to the vast multitude of eggs. In two instances only were the eggs discovered at the instant of their being laid by the ﬂies, and in both of these cases the plants were destroyed-in removing them to the house to subject them to closer examination, and thus the attempt was defeated to fix the period more definitely that the egg remains exposed on the leaf.
As soon as the eggs hatch, the worms commence their Jour ney down the blade to its point of contact with the main stalk.
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