Porthesia scintillans Walker, a genus of Lepidoptera, family Toxinidae.
【Host】Lychee, longan, citrus, loquat, mango, pear, peach, plum, grape and other fruit trees.
【Harmful】The larvae are used as pests to cause leaf defects and holes in the leaves, and they also eat young fruits.
【Morphological characteristics】Adult insects Body length 12~14mm, wingspan 20~38mm; body dark yellowish brown; forewings yellowish brown to russet brown, cloth gray small scales, inner and outer lines yellow, leading, outer and marginal hairs yellow, outer edge and margin hair are divided into three segments by yellow-brown parts; hindwings are yellowish. The eggs are slightly oblate and spherical, clustered from the eggs, covered with yellow-brown villi. The larvae are 21 to 28 mm long, the head is light brown or brown, the body is dark brown, the anterior mid-thorax and the dorsal line of the third to seventh and ninth abdominal segments are yellow, and the center runs through a thin red line, and the posterior thorax is red. The anterior thoracic side is red , with short, black velvet-like tufts on the back of the first , second , and eighth ventral segments. Pupae are conical, brown, with loose brown silk cocoons.
【Living habits】Guangdong and Guangxi have 4 to 5 generations a year, and Fujian has 3 to 4 generations a year. Overwinter with larvae. Adults are nocturnal and phototropic. The eggs are laid on the back of the leaves. The hatching larvae feed in clusters, nibble on the leaf dorsal, retain the upper epidermis, and disperse after two to three instars. It is common to bite the leaves into a missing moment, or to bite all the young buds, the buds are bitten, and the young fruits after biting the flowers are extremely common. Mature larvae pupate into the topsoil.
【Control method】Refer to the control of lychee mushroom moth. (1) Do a good job of cleaning the orchard and eradicating the weeds in the garden, which can reduce the harm. (2) Pharmaceutical control can refer to the control of lychee coarse shin green moth.