30 



THE MONTHLY BULLETIN. 



during the summer months all stages may be found. A complete life 

 cycle from egg to adult occupies about two mouths. The adults begin 

 to hibernate during the months of October, November and Decemlier. 



Distribution. — The bean thrips are distril)uted throughout the 

 entire State. It was first collected by Geo. W. Harney, present horti- 

 cultural commissioner of Yuba County, in 1894. 



Pig. 27. — The bean tlirips, Heliothrips fasciotus Perg. Greatly enlargvil. 



( After Russell. ) 



Food Plants. — Due to its large numbers this insect has proved 

 n serioiLs pest to oranges, alfalfa, pear trees and various garden crops, 

 the work being the same as that of other members of the family. !ii 

 addition to these, the following plants are also attacked by this i)e^t: 

 beans', burr-clover, beets, radishes, pea, lettuce, wild lettuce, sow-thistk'. 

 w^ld heliotrope. Euryptera Incida, Gnaphalium caJifornicut». Mirabllls 

 califoDnca, Ex nanus brevipcs, Chcnopodiioii inurale, wild sunflower. 

 wild turnip, wild pea, nasturium. NicofiaHa glauca, Bidens pilosa, Ver- 

 bascum virgafuni, Polygo)n(i)i (iriculare, Ci'cpis sp. Tacsoiiia nioUis.siina, 

 tulip, jjcar, cotton. 



Control. — Control measures for this pest are the same as recom- 

 mended for pear, citrus or grain thrips, depending u]>on th<' plants 

 which are infested. 



A flour paste consisting of from six to eight })()unds of eheap flour 

 to one hundred gallons of water and applied thoroughly has given 

 excellent results in controlling this pest upon truck crops, such as beMiis, 

 peas, beets, etc., which have tender foliage. 



