Sauris interruptaria Moore, also known as the dark green pink ruler moth. It belongs to lepidoptera, Ullaidae.
【Host】Fruit trees such as lychee and longan.
[For the pest] the larvae are harmful to the young shoots, biting the young leaves, causing a lack of moments, seriously eating the whole leaf, affecting normal growth. It is also harmful to young fruits.
【Morphological characteristics】Adult insects have a body length of 8 to 10 mm and a wingspan of 25 to 26 mm; the dorsal and forewings of the body are dark brown, and the compound eyes are black brown; the apical horns of the forewings are rounded and blunt, the outer edge is curved, and the baseline, inner line and outer line are all black-brown double-line corrugated; the hindwings are gray and have no markings; and the antennae of the female and male adults are filamentous. Egg Oblong-oval, pale yellow at first birth, red near-hatching, about 1 mm long, slightly larger at one end, flat at the end, slightly sunken in the middle, blunt and round at the other end, with a hexagonal reticule on the side of the egg. Larvae The terminal larvae are 33 to 35 mm long, with a variety of body colors, generally bright yellow-green; the dorsal midline is purple-reddish-brown, banded; the hip plate is short and blunt, and does not reach the end of the buttocks. Pupae are dark yellowish green to tan with 4 pairs of gluteal spines arranged in a ∩ shape.
【Living habits】Guangdong occurs 7 to 8 generations a year, with pupae overwintering among the fallen leaves under the canopy. Adults tend to feather in the second half of the night, rest on the canopy or trunk during the day, are nocturnal, and have phototropism and youthful greening. The eggs are scattered on the leaf margins of new shoots, young leaves and buds, and 1 to 2 eggs are laid per leaf. The hatching larvae feed along the leaf margin, are eaten into a reticulated hole, and after three instars the larva bites into a missing moment, the larval stage is not moving, lying on the back of the leaf margin or the body is stretched like a branch when stationary, and the leaf edge is about 45 ° angle. The old mature larvae spit silk in the canopy of the tree to roll several leaves into simple buds and pupate in them. In Guangzhou, the first generation occurs from early April to mid-May, the second generation occurs from mid-May to mid-June, and the next 25 to 35 days complete the first generation, and the generations overlap, and the last generation of larvae appears in late October to early December. It occurs from August to November throughout the year.
【Control method】Control with reference to the coarse shin green ruler moth. (1) Clear the garden in winter, cut off insect pest branches, control the winter shoots, block its food source, and reduce the source of overwintering insects. (2) Use adult insects to have phototropism, and use black or blue light lamps to trap them. (3) Spray control at a young age of the larvae. Optional pesticides: 4.5% high-efficiency cypermethrin emulsion 1000~1500 times liquid, 2.5% cypermethrin (enemy killing) emulsion 1000~1500 times liquid, 2.5% high-efficiency cypermethrin (kung fu) emulsion 1000 ~1500 times liquid, Thuringiensis (Bt) wettable powder or emulsion 600 to 800 times liquid, or add 10% cypermethrin emulsion, 90% dimethoate crystals 1000 ~ 1500 times liquid prevention effect is better. In areas with strong drug resistance, 1.8% avermectin microemulsion 1000 to 1500 times liquid, 2% methylamino avermectin benzoate emulsion 1500 to 2000 times liquid or 5% chlorphenoxybenzoamide suspension 1000 times liquid spray can be used.