Control Effect of the Stripe Flea Beetle, Phyllotreta striolata (Fabricius), by Application of the Entomopathogenic Nematode, Steinernema carpocapsae, on a Japanese Radish

Abstract

The control of the stripe flea beetle, Phyllotreta striolata, by drench treatment of an entomopathogenic nematode, Steinernema carpocapsae, was examined on Japanese radish fields. Damages on Japanese radish roots by P. striolata larvae at harvest time were reduced by 3-5 times of treatment with 250-500 thousand nematodes/m² dissolved in water during the growing period of this crop. Moreover, damages were further reduced by 2-3 times of treatment with 250 thousand nematodes/m² in combination with seed furrow treatment of 4kg/10 a Tefluthrin G. The control of P. striolata by drench treatment of S. carpocapsae was more effective with treatments of many times than those of many nematodes.