REPORT OF THE ENTOMOLOGISTS. 



I. INSPECTION OF NUESERIES AND TREAT- 

 MENT OF INFECTED NUHSERY STOCK * 



V. H. LOWE. 



SUMMARY 



Most of the nurseries inspected have been found practically free 

 from insect pests of a serious nature. Ten important species 

 have been found at different times, however, in sufficient numbers 

 to do serious injury. In all cases efforts were at once made to 

 clean out the stock thus infested. The most important insect 

 which attacks nursery stock in this State is the San Jos6 scale. 

 It is important to nurserymen not only because of the injury 

 which it may do to the infested stock, but because it is greatly 

 dreaded by both dealers and fruit growers alike. Hence, stock 

 from a nusery which is known to have been once infested does 

 not find a ready sale. 



Experiments in dipping and spraying young nursery trees indi- 

 cate that plant lice may be controlled in the nursery by dipping 

 the curled tips of infested trees in a solution of whale oil soap, 

 one pound to seven gallons of water. The work should be done 

 early in the season. Flea beetles attacking young pear and apple 

 trees may be held in check by spraying with green arsenite, one 

 pound to 100 gallons of water, and the canker worm will succumb 

 to the same treatment. 



The experiments in fumigating nursery stock with hydrocyanic 

 acid gas, when the stock is piled in the cellar for winter storage, 

 indicate that this method may prove practical, thus avoiding the 

 necessity of building special fumigating houses. 



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* Reprint of Bulletin No. 136. 



