. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 30 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. SEASONAL HISTORY. Observations on the life history of the grape-berry moth extend over the seasons of 1907; 1908, and 1909. During the latter year special efforts were made to obtain complete records on the develop- ment of the insect in its various stages. In many respects the seasonal conditions during 1907 and 1908 were unusual, the spring of 1907 being late and the entire season of 1908 unusually early. The season of 1909 was in most respects normal. LIFE-HISTORY S
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. 30 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. SEASONAL HISTORY. Observations on the life history of the grape-berry moth extend over the seasons of 1907; 1908, and 1909. During the latter year special efforts were made to obtain complete records on the develop- ment of the insect in its various stages. In many respects the seasonal conditions during 1907 and 1908 were unusual, the spring of 1907 being late and the entire season of 1908 unusually early. The season of 1909 was in most respects normal. LIFE-HISTORY STUDIES IN 1909. The emergence record of the spring brood of the grape-berry moth was secured from leaves upon which larvae had made cocoons during the fall of 1908. These leaves were left out of doors in a cage all 30 i:::::»:i:::::â¢::»:i»::H::::::: â :»::: CO ~ 15 0) "? 10 D z: E 25 mmMmmmmmmBmmmm 20 tntttitnffi^ ' ifnffl tmmltnflW jljffltt Hiiiaf IJHjijjjjiyijijjiyjJjNJidJnuJajjEjijaijjaiJjii. I 4 7 to 13 lb H 2Z StS ftfi \ 4 7 10 K3 »fc 11 ZZ Z5 28 31 3 fc June July Fig. 10.âDiagram showing time of emergence of spring-brood moths of the grape-berry moth in 1909, at North East, Pa. (Original.) winter so as to be subject, as nearly as possible, to natural conditions. On May 17, 1909, 1,000 of these cocoons were separated from this mass of leaves and placed in jars in an outdoor rearing shelter (see PI. VII, fig. 1) and the following emergence record was secured by a daily examination of the jars and the removal of all moths. SPRING BROOD OP MOTHS. Time of emergence of spring brood of moths.âTable I gives the emer- gence of all the moths from these jars. The total number of moths to emerge was 507. The number of moths that emerged from June 3 to June 14 was 28, or per cent; from June 14 to July 14, 455, or per cent; from July 14 to August 5, 24, or per cent. The maximum emergence occurred June 21. (See fig. 10, showing time of emergence of
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