in these leaves. The leaves bearing cocoons were removed each day 
and fresh ones supplied. The cocoons were placed in small jelly 
glasses until the moths emerged. The moths were removed each 
day as the records were taken. To secure oviposition records when 
the moths are confined several different methods have been tried 
but all without satisfactory results. 
Throughout this work the rearing records have been checked and 
supplemented by extensive field observations and, except where 
noted, represent as nearly the actual conditions as it was possible to 
approximate. Each table presented is to be considered complete in 
itself and not dependent on any other table. Special methods for 
the securing of any particular records are given with the records. 
WEATHER CONDITIONS IN 1916, 1917, AND 1918. 
Seasonal-history data sufficient for accurate timing of spray 
applications were secured in 1916 and the other data secured were 
incidental. The weather conditions in the season of 1916 were 
about normal except for an unusually warm dry autumn. In 1917 
the records are more complete, but represent an abnormally late and 
wet season throughout. The fall was unusually cold and rainy and 
considerably retarded the development of the second-brood larva?. 
In 1918 berry-moth infestation was generally light throughout 
northern Ohio and difficulty was experienced early in the season in 
securing sufficient material for rearing records. The season of 1918 
opened unseasonably early and remained advanced throughout. 
SEASONAL-HISTORY STUDIES, 1916. 
These studies began with the collection of early hatching first- 
brood larvae in the vineyards. Vineyards known to have been 
heavily infested in 1915 were searched carefully on June 1, 5. 10, 
and 14, but not until June 20 was a larva found. At this time only 
an occasional larva could be found and there was no general infesta- 
tion of the grape cluster buds. Not until July 5 were larvae present 
in the vineyards in any considerable number. Collections of larva? 
were made frequently and regularly throughout the season, beginning 
June 20. 
FIRST GENERATION. 
TEME OF FIRST-BROOD LARV^ LEAVING THE FRUIT. 
Actual records began with the early hatching larva? leaving the 
fruit. Table I shows the dates on which the first-brood larva? spun 
their cocoons. The earliest date is seen to be June 28 and the latest 
August 18, with the greatest number cocooning on July 21. It 
seems worthy of note that a very large percentage, 81.35 per cent, 
cocooned within the 12-day period from July 16 to July 27, inclusive. 
