U. S. DEPARTMENT OF AGRICULTURE 



AGRICULTURAL RESEARCH SERVICE POSTAGE AND FEES PAID 



HYATTSVILLE, MARYLAND 20782 U. S. DEPARTMENT OF 



AGRICULTURE 



OFFICIAL BUSINESS AGR 101 



PENALTY FOR PRIVATE USE. $300 



(99) Smith, Jr., D. H., and Lee, C. 1972. reduction in yield of spring 



WHEAT CAUSED BY CEREAL LEAF BEETLES. J. Econ. Ent. 65: 832-835. 



Yield loss (percentage basis) caused by Oulema melanopus indicated the 

 superiority of pubescent Triticum lines for resistance to this insect. 



(100) Gage, S. H. and Smith, Jr., D. H. 1973. suppression of the cereal 



leaf beetle with resistant wheat. Environ. Ent. 2: 1089-1091. 



Oulema melanopus egg input and summer adult emergence per unit area 

 were considerably lower in field plots of Triticum aestivum with densely pu- 

 bescent leaf surfaces, than in plots where T. aestivum plants had much less 

 leaf surface pubescence. 



(101) Wel,lso, S. G. 1973. CEREAL leaf beetle larval feeding, orientation, de- 



velopment, AND SURVIVAL ON FOUR SMALL GRAIN CULTIVARS IN THE LAB- 

 ORATORY. Ann. Ent. Soc Amer. 66: 1201-1208. 

 Survival of Oulema melanopus from first- instar larva to the adult stage 

 was considerably lower on CI 8519 wheat (Triticum aestivum L.), than on 

 'Genesee' wheat (T. aestivum), 'Clintland 64' oats (Avena sativa L.), or 

 'Hudson' barley (Hordeum vulgare L. Emend. Lam.). The length and den- 

 sity of trichomes of CI 8519 were much greater than those of the other 

 three hosts. Larval survival appeared to be related to physical factors rather 

 than nutritional deficiencies. 



U.S. GOVERNMENT PRINTING OFFICE: 1975 O - 591-467. 



