Determination of the porcentage of infestation by the hessian fly phytophaga destructor say - Larrimer, W. H.; Cartwright, W. B.
Sobretiro de: Journal of agricultural research 32 (11): 1041-1044, 1926. Encuadernado con: Key toi gall midges (A resume of studies I-VII, itonididae) /by Ephraim Porter Felt 70-213
Keywords: Dipteros -- Colecciones de escritos Hessian Flies