Abstract
In order to develop a method for controlling the Anomala schöenfeldti Ohaus increase in turfgrass, the authors sprayed turfgrass with certain agricultural chemicals at their emergence period on the ground, examined the change of imagoes in number, the efficacy in killing them, and the distance oftheir flight.
(1) Sumithion emulsion had the greatest efficacy for controlling this insect, and their density could be decreased below 5% by spraying 10 a with 250l of 1/1000 diluted emulsion.
(2) In the Tokai district two peaks of emergence of the imagoes were found, from the middle of June until the middle of July and from the middle of August until the end of that month. So, to control this insect, the spraying of this emulsion is needed three times: in the middle of June, at the beginning of July, and in the middle of August.
(3) This imago emerges on the ground copiously even on a rainy day; the peak of this emergence is from the middle of June until the middle of July, which is the rainy season.
To control this insect, the spraying of chemicals must be carried out on a clear day.
