Study on the improvement of trap baited with sexual attractant for capturing moths of Helicoverpa armigera and its application

It can raise efficiency of capturing moths of Hdicaverpa armigera by using improved traps made of waste cooking oil bottle. The efficiency was highest when thu baffle was 3 cm above the top of the trap. The sensitivity of improved trap increased by 18. 72 percent as compared with the conventional water earthen bowl trap and water tray trap. The number of attracted moths by improved trap in a year was 116. 3 percent more than that of the water earthen bowl trap, but 79. 8 percent less than that of the water tray trap.