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"The Response of Potato Root Eelworm, Heterodera Rostochiensis Wollenweber and Beet Eelworm, H. Schachtii Schmidt To Root Diffusates of Some Grasses, Cereals and of Tagetes Minuta" published on 01 Jan 1961 by Brill.
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Shepherd et al. (1961) studied this question.
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