Control Effectiveness of Stalkborer, Cossus insularis(Staudinger), by Improved Pouring Processing Method in Trunk Tree of Entomopathogenic Nematode, Steinernema carpocapsae, on Japanese Pear Trees
Tennou Branch Office of Fruit-Tree Experiment Station, Akita Prefectural Agriculture, Forestry and Fisheries Research Center Akita Plant Protection Office