Celestial bulls, one of the more common pests in citrus groves, will eat branches, causing the damaged branches to be riddled with holes, easy to die or wind fold. After the early damage of orange trees, there will be symptoms of yellow leaves and shoots; when the damage is serious, the tree grows slowly and weakly, and it is easy to break in the wind, causing major losses to fruit growers and friends. So here are three kinds of Celestial Bulls:
The light shield green sky bull can reach a length of 24 to 27 mm, and the whole body is dark green. Its forebreast is about equal in length and width , the shield is shiny , the antennae and feet are dark blue to black-purple , the head has fine incisions , and the antennae are slightly longer than the body length.
Light Shield Green Celestial Bull
Orange-brown celestial bull, female adult body length 46 mm, male body length 36 mm. The body and wings of the orange-brown celestial bull are black, densely covered with short yellow hairs, and there is a longitudinal groove in the center of the head; the stalk and stem segments of the antennae are black, the base of each segment of the whip is grayish-white, the end is black-brown, and the antennae are longer than the body; there are transverse wrinkles on the back of the forebreast, there are 1 thorn-like protrusions in the center of the sides, and the base of the elytra is densely granular black grains.
Orange-brown celestial bull
Star Sky Bull, body length of about 24 ~ 39mm, width of 9 ~ 15mm, body black, shiny. The antennae are whipped in 11 segments, and the base of each segment from the 3rd to the end of the antennae has small markings composed of fine blue-white fur, the antennae of male insects exceed the outside of the body by 4 to 5 segments, and the antennae of female insects exceed the outside of the body by 1 to 2 segments. There is a longitudinal concave line in the center of the head, and there are 3 nodular protrusions in the middle of the dorsal plate of the anterior thorax, with 1 thick and short spike on each side. The elytra are black , and each elytra is scattered with about 20 white spots of varying sizes consisting of fine hairs.
Star Cow
The control of Tianniu mainly includes: First, cut off insect branches and kill adult insects in time. The second is the adult insect occurrence period, combined with other pests for control, the wood chips in the worm hole can be eliminated, and the cotton is dipped in 40% propyl bromide emulsion or 48% chlorpyrifos emulsion 5 to 10 times liquid into the worm hole, and then the hole is sealed with mud to kill the larvae; it can also be sprayed with 48% chlorpyrifos 50 to 60 times liquid during the spawning period for control.