Sweetpotato hawk moth, also known as the Convolvulidae, belongs to the lepidoptera genus Moth, and it is an intermittent pest. It is one of the main pests of sweet potato. In areas where sweet potato is cultivated in China, damage may occur. The main damage sweet potato, edible convolvulaceae plants and leguminous, Solanaceae plants. Larvae damage the leaves and tender stems of sweet potatoes. When they are severe, they can eat the leaves and affect the yield.
On August 18th, the plant protection station of Fengxiang County Agricultural Technology Center was stationed in a group of sweet potato fields in Dongbai Village, Hengshui Town. The sweetpotato hornworm occurred sporadically. Occurrence area of ​​50 acres, re-issued area of ​​5 acres, mainly for the damage of leaves and stems, re-eating field old leaves basically eaten. The number of 100 insects is about 100 heads, most of which are mature larvae aged 5-6 years, which is a time of overeating. The mature larvae are 5-7 inches long and have three body colors: yellow, green, and yellow-green.
According to the prediction of the occurrence rule of sweetpotato hawkmoth, it took 1-2 generations a year in our land, and the summer high temperature was little rain, and it took about 30 days for the sweetpotato hawk moth to breed for a generation. The current generation of larvae is about to enter the phlegm-removing period, and the middle-late september is The second-generation larvae are in the stage of damage, and the positive value of the sweet potato Peng Dasheng in our county is particularly important. Therefore, it is imminent to control the generation of sweet potato hawk moth and reduce the population density.
Control methods:
Mu is sprayed with 2.5% deltamethrin EC 2000x or 48% chlorpyrifos EC 1000-1500x or Bt Emulsion 600X.
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