. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. STRAWBERRY PESTS 1941 injurious, but in its new surroundings fre- quently outruns its natural checks. At tlie present time it extends from Canada to Virginia and probably even further south, and westward to the Mississippi valley, very often in harmful numbers. In the adult stage, it measures with ex- panded wings about three-fifths of an inch. I
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. STRAWBERRY PESTS 1941 injurious, but in its new surroundings fre- quently outruns its natural checks. At tlie present time it extends from Canada to Virginia and probably even further south, and westward to the Mississippi valley, very often in harmful numbers. In the adult stage, it measures with ex- panded wings about three-fifths of an inch. Its color is light reddish brown, the fore- wings streaked with wavy darker brown and white lines. Life History and Habits This moth makes its appearance in the strawberry fields in early May, and may be expected in full force about the mid- dle of and extending up to June 1st. The insects mate soon after their ap- pearance and egg-laying begins at once. Larvae hatch from these eggs in from five to seven days, and at once make their way to the upper surface. At this time the minute creatures are light green in color, with a proportionately large head and rather long hair. When first noticed they are about an eighth of an inch in length and are feeding along the midrib or a large vein. For a day or two the minute caterpillar feeds thus without pro- tection, gnawing into the vein or along- side so as to weaken the tissue, and then it begins to draw the upper surfaces of the leaf or lobe together by means of fine silken threads, until there is a com- plete fold that forms a shelter for its maker. It feeds continuously within its shel- ter, and improves it by making the fold more complete and more secure, and sometimes actually making a roll of an entire leaf. The life cycle is about 45 days. Three broods hatch during the summer but the last does not complete its transforma- tion until the following April. The important parts of this record are that the eggs are laid on the undersid
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Keywords: ., bookcentury1900, booksubjectfruitculture, booksubjectgardening
