Effect of spacing, roguing and weeding on the incidence of rosette disease of groundnut with observations on the aphid vector, Aphis craccivora Koch.
In field tests in 1964 at two places in Tamil Nadu, India, the effects of spacing, roguing and weeding on the incidence of rosette disease of groundnut and its vector Aphis craccivora Koch were investigated. Eight spacings (varying from 6 X 6 in. to 12 X 12 in.) and four cultural treatments were investigated, and it was found that close spacing and late weeding (weeding twice with an interval of 30 days) reduced aphid infestation and the incidence of rosette disease and increased the yield [cf. RAE/A 52, p. 199; 56, 2106, etc]. Roguing also reduced disease incidence.