In the maintenance of lawn, the occurrence and prevention of a variety of diseases and insect pests is the key management work, which directly affects the healthy growth and ornamental value of lawn grass, and for lawn insect pests, the harm of nocturnal moths sometimes causes large areas of lawn baldness, yellowing and other phenomena, mainly including two major categories of light sword nocturnal moth and twill nocturnal moth!
【1】Light Sword Night Moth:
1. Identification characteristics: the body color of the larvae changes greatly: gray-brown at the beginning of hatching, the head is reddish-brown; it is green after feeding; the old mature larvae are cylindrical, the head is light brown oval, the abdomen is blue-green, and there is a black "eight" pattern along the deciduating line. The larvae are suspended dead and curled in a "C" shape when shaken.
2. Main hazards: The main harm is the cold season lawn of grasses such as early maturing grass, high fescue, rye grass and other grasses, which is one of the main pests of lawn. The larvae feed on plant leaves, which are bulivorous pests and feed nearby after hatching. 5 to 6 years old is the binge eating period, the leaf veins and young stems are eaten, and the bite is harmful day and night on rainy days and nights.
3. Occurrence law: old mature larvae overwinter in lawns, weeds, etc. In early to mid-June, the overwintering larvae pupate gradually feathered and laid eggs, and the insect was infested from May to October.
【2】Twill nocturnal moth:
1. Morphological characteristics: the larvae are 33-50 mm long, the head is black-brown, the thorax is changeable, from earth yellow to black-green, the body surface is scattered with small white dots, and there is a pair of triangular half-moon black spots in the winter.
2. Hazard characteristics: Twill nocturnal moth occurs in all parts of the country, is a kind of buliative pest, the initial hatching of the larvae concentrated leaf back to nibble leaf flesh, after 3 years of age separately and nibble on the whole leaf, after 4 years into the gluttony period, severe can be 2 to 3 nights can eat the leaves can be eaten.
3. Occurrence law: The main harm period is June, July, August, September, October these five months, of which July, August, September is the most seriously harmful.
【3】Control methods of nocturnal moths in lawn:
During the pest occurrence period, it is recommended to use 300-450 kg of spray control per bottle of water in Qilin Huoji; or use Qilin Guangzheng to mix 150-200 kg of spray control per bottle of water.
