An Improved Optical Planimeter for Measuring the Area of Detached Leaves Used in Estimating Populations of Aphids1,2

Author: ROBINSON P. P.   SHANDS W. A.   STORMANN C. L.   SIMPSON GEDDES W.  

Publisher: Entomological Society of America

ISSN: 1938-291X

Source: Journal of Economic Entomology, Vol.63, Iss.4, 1970-08, pp. : 1160-1162

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