Bureau of Entomology, Charles Valentine Riley ... Truckers using these materials constantly are a unit in claiming practical exemption from cut-worm injury, which is often ... I have no desire to present statistics on this subject; these I will reserve for another occasion; my object will be gained by the ... The strength at which a substance proves effective, and its action on the plant, are matters of importance.
|Title||:||Insect Life ...|
|Author||:||United States. Bureau of Entomology, Charles Valentine Riley|