Brazzel, J. R <br/><br/>
Toxicity of certaín insecticides against bollworms and tobacco budworms  / 
J. R. Brazzel 
 - College Station, Texas  :   Agricultural Experiment Station 
 - 7 h. 
 - Texas Agri. Exp. Sta. Progress report; 2236 .
<br/><br/><label>LCCN: </label>202861 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Insecticidas -- Toxicidad  Heliothis virescens  Control de plagas