包心白菜青蟲類防治試驗

Abstract

大利農 34% WP 加水1000倍和 1500倍防治包心白菜之小菜蛾和蚜蟲，於定植後每隔十天噴射一次，與標準藥劑馬拉松 50% EC比較，無論防治效果及產量均屬優異，大利農加水 1000倍區略較 1500倍區為優，但兩者間之差異不甚顯著，所以最好在害蟲發生較不嚴重時，採用 1500倍，若害蟲之度甚高時，還是用 1000倍，以便一舉而殺滅之。 Since the diamond-back moth (Plutella maculipennis Curtis) has developed insecticidal resistance in Taiwan, several insectides, such as DDVP and Parathion which were previously used to control this pest, have now been useless as reported by some wokers.