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The main distinguishing feature between the two species is that the Japanese beetle has five tufts of white hair along both sides of the abdomen and two small dots of white hair on the tip of it . For this reason , carefully clean soil off your tools and even your shoes . CAUTION : Read all label directions very carefully before purchasing and again before using an insecticide . Before purchasing geraniums , inspect the leaves carefully for rust pustules and yellow leaf spots to avoid purchasing infected plants . Grafting describes any of a number of techniques in which a section of a stem with leaf buds is inserted into the stock of a tree . Lacking rain , water iris before and after applying nematodes . Both species ( Heterorhabditis and Steinernema ) have been shown to attack iris borer . Symptoms of gray mold depend on both host and the environmental conditions . Both apple and pear trees will set abundant crops of fruit if conditions are good during bloom . They are both scarab beetles belonging to the same subfamily , shining leaf chafers ( Rutelinae ) . Adults are greenish yellow with four black stripes down the wings . After the fifth year , prune the bushes annually in the early spring , just before growth starts . Keep the bush fairly open by cutting out any weak , old stems that no longer produce strong young wood at ground level . Even using insecticides may not be completely effective , as insecticide residues may not control any new beetles that fly into the garden . A fungicide program should start in the summer just before leaves become spotted . Proper diagnosis is necessary prior to undertaking any control strategy .