REPORT OP THE STATE ENTOMOLOGIST 1902 103 



Rotation of crops. This may be practised with comparatively 

 little expense, and is very successful in checking pests of this 

 character. The fields planted in successive years should be as 

 far from others as practicable. Some of the most serious injuries 

 have occurred on pieces where carrots have been grown year after 

 year. Now that we know this insect breeds in celery as well as 

 carrots, one should not follow the other. Clean cultivation should 

 also be practised in order to destroy all remnants of either celery 

 or carrots in which the insects may pass the winter. 



Destruction of the insect in stored roots. The breeding of this 

 species in stored roots suggests the advisability of destroying the 

 larvae which forsake the roots and enter the soil to undergo their 

 transformations, or the puparia. Where roots are packed in 

 earth, the surrounding soil may be either buried deeply or spread 

 out in thin layers where it will be exposed to the elements, or 

 thrown into pools where it may be frozen, or exposed to heat or 

 steam or any agency which will result in the destruction of the 

 contained insects. These roots are also frequently stored in bins 

 in cellars; and such inclosures, if nothing else be done, should 

 have all openings protected by a fine wire screen, so that the adult 

 insects can not escai)e to the open the following spring. It might 

 be possible to fumigate such a cellar with carbon bisulfid or 

 sulfur or hydrocyanic gas before opening it in the spring. 



Fall cultivation. Mr Chittenden has recommended the light 



raking or cultivating of celery or carrot beds in the fall, so thai 



the larvae or puparia may be destroyed by the frost. He also 



thinks that plowing early the following spring before the flies 



have had time to escape would result in destroying many of the 



insects. 



NOTES FOR THE YEAR 



The following brief account includes some of the more im- 

 portant insects brought to notice during 1902. 



Special attention, as in the case of last year, has been given 

 to forest and shade tree insects throughout the summer. Sys- 

 tematic collecting was continued at Karner, where there is an 

 admirable growth of scrub oaks and small pines, and much val- 

 uable material secured, which will be reported on in another 

 publication. The warm, sandy soil of Karner seems specially 

 adapted for certain heat-loving insects; and last year we 



