. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. MASS. EXPERIMENT STATION BULLETIN No. 285 Figure 2. -Number of Punctures Made In Apples by Twenty Plum CurcuHos when Confined at Low, Normal, and High Temperatures. Waltham, Mass., 1930 INSECTARf --ffOOT CELLAR â oâCUE £N HOUSE. 19 20 £1 32 S3 24 a 16 2710 £930 %l 12 3 4 5 6 7 B 9 10 II 12 13 14 IS 16 17 19 MAY JUNE Activity of Beetles Preliminary Experiments in 1930 The first experiments relating to the effect of temperature on the activity of the plum curculio were made in a root cellar, a greenhouse
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. MASS. EXPERIMENT STATION BULLETIN No. 285 Figure 2. -Number of Punctures Made In Apples by Twenty Plum CurcuHos when Confined at Low, Normal, and High Temperatures. Waltham, Mass., 1930 INSECTARf --ffOOT CELLAR â oâCUE £N HOUSE. 19 20 £1 32 S3 24 a 16 2710 £930 %l 12 3 4 5 6 7 B 9 10 II 12 13 14 IS 16 17 19 MAY JUNE Activity of Beetles Preliminary Experiments in 1930 The first experiments relating to the effect of temperature on the activity of the plum curculio were made in a root cellar, a greenhouse, and an open-air insectary. The temperature in the root cellar was always below 70 ° F. and repre- sented moderately cool conditions, while that in the greenhouse was always above 70° F., reaching over 100° F. on warm, sunny days, and represented warm conditions. Records of the activity of 20 beetles were made daily from May 19 to June 18 which was the period of greatest normal activity. In the root cellar, each beetle made an average of punctures; in the insectary, ; and in the greenhouse, As shown in Table 2, the total number of punctures at normal outdoor temperatures was approximately twice as many as under cool conditions, and one-half as many as at high temperatures. Figure 2 shows the daily fluctuation in activity which is in direct relation to the outside temperature, and this is reflected in the records for both the greenhouse and root cellar where the temperature was only partially controlled. Table 2.âActivity of Twenty Plum Curculio Beetles Each at Low, Normal, AND High Temperatures. Waltham, Mass., May 19 to June 18, 1930 Location Condition Temperature Range Number of Punctures Egg Feeding Total Root Cellar Insectary Greenhouse Cool Normal Outdoor ^^'arm 58-70 35-94 70-105 88 279 375 541 629 912 1191 1616 1991 A nalysis of Insectary Records An analysis of the insectary records for 1927 to 1930 inclusive shows that a similar stim
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