Livres de plant pathogenic fungi
3 livres dans ce genre
Control work on the Dutch elm disease in Connecticut, New York and New Jersey, for the winter and spring of 1933-1934
United States. Bureau of Entomology and Plant Quarantine. Division of Plant Disease Eradication and Control
Pas de note
Ribes eradication manual for use in the inland empire
United States. Bureau of Entomology and Plant Quarantine
Pas de note
Protect grain crops from stem rust
United States. Division of Plant Disease Control
Pas de note