New York Agricultural Experiment Station. 611 



surface of the ground the moths or millers commenced to issue 

 July 22, 1895. Eight of these cocoons gave out good, active 

 moths; sixteen never issued. Of those buried six inches deep 

 thirty moths issued from the cocoons; six did not issue. Not 

 one of these thirty moths succeeded in reaching the surface of 

 the ground. 



The above tests were repeated again in November, 1895, with 

 slight variations, as follows: 



Pot 1. Twenty-four cocoons buried four inches deep in sand. 



Pot 2. Twenty-four coeoons buried four inches deep in black 

 dirt. 



Pot 3. Twenty-four cocoons buried six inches deep in sand. 



Pot 4. Twenty-four cocoons buried six inches deep in black 

 dirt. 



Pot 5. Twenty-four cocoons buried eight inches deep in sand. 



Pot 6. Twenty -four cocoons buried eight inches deep in black 

 dirt. 



All pots were covered with lantern globes and buried so that 

 the tops were level with the surface of the ground. All were 

 buried in the open field. 



On July 20, 1896, pot No. 3 was taken up and the contents 

 emptied out. It was found that none of the moths had issued 

 from the cocoons. The soil and cocoons were replaced without 

 reference to depth. By October 10th seventeen moths of pot 3 

 had issued and reached the surface in good condition. In pot 

 No. 2 two moths had issued and reached th^ surface of the soil. 

 It was found that the black dirt had shrunk away from the sides 

 of pot No. 2. None of the moths in any of the other pots, 

 whether in sand or black dirt, ever reached the surface of the 

 ground, although numbers of them issued from the cocoons. 



These tests tend to prove that if old squash fields are plowed at 

 a uniform depth of six inches in the spring or even in the fall, 

 and not replowcd when planted, the number of squash-borers 

 will be greatly reduced. The squash-borer is widely distributed 

 to all parts of the Ihiited States, but we rarely hear of it occur- 

 ring in any injurious numbers except in gardening districts. 



