4 HOW TO CONTROL THE PEAR THRIPS. 



Emergence Record for Contra Costa County. 



Table II. — Emergence of thrips from cages placed in ground under trees in pear and 

 prune orchards, Walnut Creek, Cal. 



Table III. — Emergence of thrips from soil samples taken from orchard in November and 

 December and kept in cages at laboratory. Walnut Creek, (\il. 



Emergence Record for Solano County, 1910. 



Table IV. — Emergence of thrips from cages placed in ground under trees in orchards, 



Suisun, Cal. 



