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A two years' survey of the potato aphides in the Northern Agricultural Advisory Province
Author(s) -
Jacob F. H.
Publication year - 1944
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1944.tb06744.x
Subject(s) - overwintering , agriculture , biology , spring (device) , work (physics) , agroforestry , ecology , agronomy , mechanical engineering , engineering
The role of aphis vectors in the deterioration of potato stocks is well known, and any effort to maintain healthy (virus‐free) stocks of potatoes depends on the degree of their isolation from these vectors. In practice this isolation depends on geographical, climatic, and biological factors; of these the biological factors are fundamental, as it is only from their study that the significant geographical and climatic factors can be determined. The present work consists of a survey made during 1942 and 1943, in the Northern Agricultural Advisory Province. Special attention is paid to overwintering, and the prevailing weather conditions at the time of the spring migration.