30 Director's Report of the 



(a) Attacks of Colorado potato beetle and flea-beetle are 

 avoided by spraying with Bordeaux mixture. 



(6) The squash borer can be controlled by cultural methods. 



(c) The onion thrips can be kept away by planting set onions 

 on the margin of the field, to be sprayed frequently with kero- 

 sene emulsion. 



(d) The red spider is largely kept from raspberries by raking 

 and burning the leaves in the fall and spraying with kerosene 

 emulsion in the spring. 



(e) The application of kainit in June diminishes the damage 

 done by the pear midge. 



Cultivation of the orchards is equally beneficial. 



if) The cabbage-looper was killed in the open field by the use 

 of poisoned resin-lime mixture. 



(g) The use of a mixture of dry bran or middlings and Paris 

 green was found to be a cheap and efficient means of preventing 

 the destruction of onions by cut worms. 



This is an important result in view of the extent of onion cul- 

 ture in Orange County, as it is estimated that during the past 

 year forty-six per cent of the crop was ruined by this pest. 



(h) The experiments of the past season indicate that spraying 

 with green arsenite and lime can be successfully used against 

 the apple fruit worm, pistol-case bearer, cotton-wood leaf beetle, 

 apple flea-beetle and the potato beetle. 



Outbreak of the army worm. — The Station was able to render 

 prompt and extensive assistance in controlling the outbreak of 

 the army worm in this state during the past season. 



Tests of insecticides. — A thorough test of dendrolene showed 

 that it is dangerous to the trees, and that as a preventive of the 

 canker worm it is unsatisfactory. 



Collections of insects. — Good progress has been made m increas- 

 ing the reference collections. The Station now has about 5,000 

 specimens, representing 2,395 species of insects, chiefly those that 

 are injurious. 



Crop Production. Alfalfa. — A record is being kept on the 

 Station farm of certain forage crops. The most noteworthy of 



