Report of the State Entomologist of Connecticut for the year ... . tural Enemies Trichogramma pretiosa was reared from eggs collected in the orchardin the spring of 1941. About Sy2 per cent of the egg masses observed inthe orchard at the time showed parasitism. Indications pointed to a smallamount of larval parasitism in the orchard in 1941 but definite evidencewas lacking. Lists of the known parasites of the red-banded leaf rollerhave been published (2, 6). Results of the Life History Studies The records of the insectary investigations are partially illustrated inFigure 4. While neither the i
Report of the State Entomologist of Connecticut for the year ... . tural Enemies Trichogramma pretiosa was reared from eggs collected in the orchardin the spring of 1941. About Sy2 per cent of the egg masses observed inthe orchard at the time showed parasitism. Indications pointed to a smallamount of larval parasitism in the orchard in 1941 but definite evidencewas lacking. Lists of the known parasites of the red-banded leaf rollerhave been published (2, 6). Results of the Life History Studies The records of the insectary investigations are partially illustrated inFigure 4. While neither the insectary nor the orchard study is completein itself, it is believed that the combined information gives a reliable picture 246 Connecticut Experiment Station Bulletin 472 for Connecticut conditions. The length of the individual stages is alsoin reasonable agreement with those reported from investigations in Penn-sylvania (4) although the number of generations is not the same. Seasonal Life History: Red Banded Leaf Roller 1940. 1941 AUGUST MAY JUNE JULY. 10 20 30 10 20 30 10 20 30 10 20 Figure 4. The red-banded leaf roller. Chart of life cycle. Moths from overwintering pupae began to emerge at the insectary inearly May in 1940 and in late April in 1941. Eggs were deposited begin-ning May 13 in 1940 and April 30 in 1941. The incubation period forindividual egg masses varied in length in 1940 from nine to 18 days,average , and in 1941 from 11 to 17 days, average days. The first hatching of eggs occurred in the insectary in 1940 on June 1,and in 1941 on May 21. In the infested orchard, located in the town ofWallingford, the first hatching of eggs noted in 1940 was on May 1941, with 165 marked egg masses, hatching was observed from May 11to May 23, the calyx spray being applied on May 13. In 1942, with 39marked egg masses, hatching was observed from May 11 to May 21, thecalyx spray being applied about May 14. The total period in which first generation larvae
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