Record. li 



4th of April, 1909, a further very careful examination was made and 

 fourteen others were found aliva, in all twenty-four out of twenty-flve 

 that had survived the winter. The weather report shows thai in Janu- 

 ary, 1909, the temperature ranged as follows: Sixth, 2 degrees; 7th, 1 

 degree; 10th, 9 degrees; 11th, 5 degrees, 12th, 3 degrees, 29th, 7 degrees; 

 30th, zero; 31st, 1 degree below zero, which would have frozen the 

 ground to a depth greater than five inches. This refutes the idea, 

 which obtains in our Southern states, that the insects are killed 

 by the cold. What really takes place is that the fruit is killed by the 

 cold and this destroys the nesting place for the insect, the result of 

 which is one or two years of sound fruit. It is of further interest 

 that the plum leaves in the can were full of holes, as if they had been 

 fed upon during the warm days of the winter and spring when the cur- 

 culio were not torpid. 



One of the jars in the cellar was permitted to become dry as the 

 Winter progressed. The curculio in the jar all died, although it was the 

 hibernating season. This lack of ability to stand drought is the prob- 

 able explanation of why the fruits from the Pacific Coast are free from 

 the pest. 



It is shown above that a considerable percentage of the curculio that 

 have successfully passed the winter will live till June or July. In this 

 series of experiments one lived until September 12th, and in another 

 series, conducted during the summer of 1910, one survived until August 

 21st, an evidence that the curculio of the preceding year are in the 

 orchard until after the usual season for gathering the peach crop. 



