Excuse me, does anyone know what a big caterpillar with thorns on the Ailanthus altissima tree is?
Trichinella spiralis:
Adult: the body length is about 23 mm, the wings are about 70 mm, and the head and chest are grayish brown and purplish; There are black stripes on the outer side of the beard of the lower lip, yellow-brown forehead, black spots at the end and 1 black stripes on the upper part; There are two pairs of black spots on the neck plate, black spots on the bottom and end of the fin base, and three pairs of black spots on the chest and back. The abdomen is apricot yellow, the tufts are black at both ends, and there are 1 black spots in the center of the back of each node. The leading edge of the front wing is black, the trailing edge is curved and lined with white, and the rest wings are purple-brown-gray. There are 4 black spots at the base of the wing, 3 black spots on the outside, 1 black spots near the base of the rear wing, L wavy black lines from the end of the middle cavity to the middle of the suffix, and the lateral horizontal lines are white, interwoven into a net from the back neck angle to the hip angle, and the secondary lateral lines are 1 row of black spots. The hind wings are mostly apricot yellow, and the terminal area has a 1 blue-black broadband, which gradually narrows backwards. There are 1 pink blue spots on it, and the edge hair is white, and the outer hair behind Yazhong Road is yellow.
Larvae: the body length is 39-4 1 mm, the head is black, the crown seam and forehead seam are gray, and there are black granules protruding from the top of the head. The chest backboard and hip plate are brown, the back is red, and the abdomen is orange. There are irregular brown transverse spots on the back of each body segment, and the back line and secondary back line are composed of discontinuous manuscript points. Chest feet and abdomen feet are gray. Bristles are white and very long, and they are attached to slightly convex trichomes. There are two hairs above the middle and rear pectoral feet, and a bristle outside the first to fourth abdominal feet. The valve is oval and yellow, and the surrounding valve plates are brown, and the throttle valve in the eighth abdomen is obliquely arranged.
Castor silkworm:
Larvae: 4 sleep and 5 instars. Worms are divided into three parts: chest and abdomen. The head skin hardens to form a head shell, and there are 6 pairs of monocular eyes on both sides of the head shell. Generally speaking, female silkworms are bigger than male silkworms. No adult characteristics were found.
I think it's probably cotton bollworm, because some larvae of castor silkworm have small protrusions and some don't. The bristles of Trichinella spiralis larvae are long and hard, which are like thorns in human eyes.