. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. THE BEETLES: ORDER COLEOPTERA 143. One of the most efficient of these is the tiny &y that depos- its its eggs in the eggs of the Curculio. The fly eggs hatch into maggots that destroy the Curculio eggs and mature in a few days into other flies like the parent parasites. Conse- quently several generations of these egg parasites may follow one another through the season. There are also other parasites that attack the Curculio larvae. The fluctuations in the abundance of
. Farm friends and farm foes : a text-book of agricultural science . Agricultural pests; Beneficial insects; Insect pests. THE BEETLES: ORDER COLEOPTERA 143. One of the most efficient of these is the tiny &y that depos- its its eggs in the eggs of the Curculio. The fly eggs hatch into maggots that destroy the Curculio eggs and mature in a few days into other flies like the parent parasites. Conse- quently several generations of these egg parasites may follow one another through the season. There are also other parasites that attack the Curculio larvae. The fluctuations in the abundance of the Curculios from sea- son to season is probably due chiefly to these parasitic enemies. It has been found that even in large orchards the injuries of the Plum Cur- culio may be prevented to a great ex- tent by spraying the trees with arsenical poisons, beginning just after the blossoms have fallen. The adult beetles feeding upon the leaves and young fruit are thus poisoned. For a few trees this method is not always so successful, and it is necessary to adopt the jarring device. When a branch upon which the adult beetles are resting is shaken, the insects fall to the ground, remaining quiet for some time afterward. By holding sheets stretched upon wooden, frames under the trees and then shaking the latter, the beetles may be collected in numbers. It is also often advisable to supplement the spraying, even in large orchards, by the jarring process. The destruction of the plums as fast as they fall and the cultivation of the soil beneath the trees during the summer are also helpful measures. A group of Snout Beetles that at times has proved very destructive in the great corn-growing regions of the Central West, is that of the Billbugs. These are compara- IN7URCD BY CURCULIO. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the or
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbenefic, bookyear1910
