- 90 
Insect 
P cctinophora gossypiella Saund. 
P hll aenus spumarius ( leucoph - 
thalmus ) L. 
Phlyc taenia rub i gal is G-uen. 
P hylIo"bius oblongus 
Phyllobius pyri 
Pieris rapae L. 
Plathypenia scabra . F. 
Plum sawfly 
Plutella "maculipennis Curtis 
Result 
Less effective 
than calcium 
arsenate 
Less effective than 
"barium fluosilicate 
Recommended 
Ineffective 
Effective 
Effective 
Less effective 
than "barium 
fluosilicate 
or calcium 
arsenate 
Some control 
Effective 
More effective 
than pyre thr ins 
Recommended 
Cube dust plus 
sulfur effective 
Recommended 
Effective a.gainst 
young larvae 
Reference 
Chapman and Williams 
Texas Apr, Expt . Sta. , 
402 
Edwards, 124 
Howard and Mason 201 
Kearns and Umpleby 237 
Reams and Umpleby 237 
Chapman and Williams 72 
3ur. Ent. and PI. Ouar. 
420; Texas Agr. Expt. 
Sta. 403 
R. S. Campbell 62; Colo 
Agr. Expt. Sta. 86, 87 
Howard and Davidson 
200; Howard and Mason 
201; U. S. Dept. Agr. 
414, 417, 420; Walker 
451; White 463, 464; 
Wisecup 473 
Colo. Agr. Expt. Sta. 
38 
Crosby and Chupp 109; 
Hervcy, Huckett and 
Clasgow 191; N, Y. Agr, 
Expt. Sta. 305; F. L. 
Thomas 405 
Brannon 45 
Xearns and Marsh 235 
Walker and Anderson 
453 
