2011 Volume 73 Issue 2 Pages 148-155
In order to develop a physical control of insect pests using airflow, we investigated the effect of airflow conditions on the removal of diamondback moth (Plutella xylostella (L.)) by using a wind tunnel test. The removal rate of the asphyxial adult moth was 100% in both the vertical and horizontal airflow at the velocity of 3.5m/s. To remove all adults adhering to the wire mesh, it took 2s in the vertical airflow and 6s in the horizontal airflow at the velocity of 20m/s. In the vertical airflow, the capture rate of flying adults at the air velocity of 3m/s was 100%. In the horizontal airflow, the capture rate was 60%. In the airflow, the larvae avoided removal by dangling from thread, and it was more difficult to remove the larvae than the adults. The removal rate of larvae at the air velocity of 20m/s was 70% in the vertical airflow, and 50% in the horizontal airflow.
