Spindasis syama Horsfield, also known as the three-spotted tiger butterfly and the three-star two-tailed swallow butterfly, belongs to the order Lepidoptera, gray butterfly family.
【Host】Persimmon and other fruit trees.
[Harmful] The larva bites the young leaves of persimmons, causing a lack of carving.
【Morphological characteristics】Adults The back of the forewings is dark gray with purple-blue markings, and the wings are spread by 25 to 30 mm. The back of the hindwings is dark grey with a purplish-blue color, with 1 pair of winged tails, a white tip of the tail, and a distinct orange spot on the hip horns. The forewings of males are triangular in shape, and the forewings of females are rounded. The ventral surface of the anterior and posterior wings has yellow, black, and silver stripes.
【Living habits】Guangdong, Fujian, Taiwan have occurred. Occurs 3 generations a year. Adults are mostly active on the edges of trees and shrubs, prefer to stay on plants, and will fly away quickly after being disturbed, but the flight distance is not far.
【Control method】Spray control and drug selection at the young leaf stage, with reference to the control of lychee small gray butterfly. (1) Remove the insect fruit and hook the pupae at the crack in the bark. (2) Spray 10 days after the flower, and spray again every 15 days. Agent options: 80% dichlorvos emulsion, 90% dichlorvos crystal 800 to 1000 times liquid, 4.5% high efficiency cypermethrin emulsion, 2.5% kung fu emulsion 1000 to 1500 times liquid, etc.