The invention discloses a
plant agent for preventing and controlling vegetable noctuidea. The
plant agent contains 3,000 grams of tea seed cake, 5,000 grams of pine leaves, 5,000 grams of illicium simonsii, 2,000 grams of ginger, 1,000 grams of kusnezoff
monkshood root, 5,000 grams of common threewingnut root, 5,000 grams of root of red-rooted
salvia and 5,000 grams of dichlorovos. The
plant agent is prepared by the following steps of: crushing or
mashing the tea seed cake, the pine leaves, the illicium simonsii, the ginger, the kusnezoff
monkshood root, the common threewingnut root and the root of red-rooted
salvia in a ratio, combining together, putting the mixture into a big iron pot, adding 120 kilograms of water to soak the mixture for 3 hours, decocting for 30 minutes, stopping the fire, filtering, taking decoction, cooling, quickly adding the dichlorovos with stirring, and forcibly stirring the decoction for 30 minutes after the dichlorovos is added.