264 SEVENTEENTH AND EIGHTEENTH 



included in these experiments, a preliminary account of 

 which will be published shortly. Such experiments in spray- 

 ing and also in dusting for our steep hillside orchards, must 

 be continued for several years. In addition, we are arrang- 

 ing for field meetings of farmers at which the actual methods 

 of spraying and the best apparatus will be shown, to be 

 followed by local records of the results to which local atten- 

 tion will be directed. An increasing interest in this subject 

 is very manifest. 



The Apple Maggot or ''railroad worm" (Trypeta pomo- 

 nella) is an almost equally injurious pest of summer and fall 

 apples, making their profitable production almost impossible 

 in many sections. This insect has received considerable 

 study in Maine, but a satisfactory method for its control 

 under many New Hampshire conditions is still to be devised. 

 A careful studv of its life and habits is now being under- 

 taken and experiments with methods of control will be in- 

 augurated next year. 



During the past two seasons there has been an unusual 

 abundance of various species of caterpillars which commonly 

 effect the apple tree during late summer. These are dis- 

 cussed more fully in the 28th report of New Hampshire 

 College, pages 319-353, and further observations on them 

 and the other insects of the apple will be continued. 



Garden Insects. — Two of the most injurious insects of the 

 garden are the Striped Cucumber Beetle (Diabrotica znttafa) 

 which affects melons, cucumbers, and all plants of this fam- 

 ily, and the Cabbage Root Maggot, which often seriously 

 interferes with the growth of cabbage, radishes, turnips, etc. 

 These insects have been under observation for several years 

 at this Station and numerous experiments have been made 

 with methods of control. Studies of both were made during 

 the past season, but it was impossible to make experiments 

 which were sufficiently conclusive to enable us to give defi- 

 nite advice as to satisfactory means of control. Further 

 studies of these pests will be conducted next year, when we 

 hope to be able to publish definitely concerning them. 



