Experiments for the Control of the Grape Root-Worm

Cover Experiments for the Control of the Grape Root-Worm
Experiments for the Control of the Grape Root-Worm
Frederick Zeller Hartzell
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On the following day, six dead beetles were found on the sheet underneath the vine sprayed with molasses and arsenate of lead, and about one himdred and fifty dead beetles were found on the ground under the vines of one row, but no beetles were found on the sheets spread under the vines sprayed with the other materials, nor were any to be found on the ground. It seemed to us that the possibility of killing the insects instead of driving them to neighboring vines was worthy of further careful co...nsideration. A favorite criticism of the bordeaux- poison spray with grape growers has been that no dead beetles have been found under tiie sprayed vines, and naturally they are skeptical regarding its . efficiency . For this reason the knowledge that the beetles could be killed was hailed with much enthusiasm by both the growers and the writer. It will be noted that the egg counts are not as favorable as could be desired, but we felt that this material required further experimentation to discover and establish its merits, and as far as possible to eliminate its faults.

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