them additional vigor, and harvesting as early as possible. The 

 June grass should either be cut as soon as the heads begin to turn 

 white, or be fed green. 



" So far as I can learn, the seed of this grass is sold only in lawn 

 mixtures, and is not used for field seeding. The June grass comes 

 in gradually, as the stouter-growing species usually sown run out. 

 Attacks are most severe on fields that have been seeded for several 

 years and have become partially exhausted. This suggests plough- 

 ing deeply, and planting for at least one year with some cultivated 

 crop before reseeding." 



TREATMENT FOR THRIPS IN GREEN- 

 HOUSES. 



During the past few years attention has been called several times 

 to the severe injury caused by thrips to hothouse cucumbers. 



This is a different species from that described on grass though 

 the two are quite similar in color and general appearance. Reports 

 of the injury to cucumbers show that this insect is widely distributed 

 over the state and is becoming of considerable economic importance. 

 "While the main points of its life histor}' are quite similar to those of 

 the grass thrips already described in this bulletin, the methods to be 

 used in its control must, of course, be very different. In order to 

 find some substance which may be used for the successful treatment 

 of this pest, experiments have been carried on with it, with the kind 

 permission and assistance of Dr. G. E. Stone, iu the greenhouses of 

 the Hatch Experiment Station. A record of these experiments with 

 the results obtained is given herewith. 



