Identification and integrated control of the Yellow Poison Moth in Taiwan
The Taiwan yellow poison moth, Porthesia taiwana Shiraki, is an insect of the family Venomidae of the lepidoptera genus Venomidae. Aliases spiny caterpillar, caterpillar, etc. Distributed in Guangdong, Hainan, Taiwan, Okinawa and other places.
Taiwan yellow poison moth adult remake photo
Hazardous crops:
Tea, asparagus, tomatoes, corn, peaches, grapes, pears, citrus, guava, mulberry, apricot, plum, persimmon, coffee and other more than 70 kinds of fruits and vegetables and other plants. 1-2 instar larvae eat leaves in clusters into missing or holes, and then disperse into harmful leaves, buds, flowers and fruits. Adults suck crop juice in swarms.
Retake of taiwan yellow poison moth larvae
Morphological characteristics
imago
Adults are 9–12 mm long, the female moth is larger than the male moth, the head, antennae, thorax and forewings are yellow, the compound eyes are round and red, and the back of the forearm and the inner edge of the forewing have yellow dense fine hairs. The antennae are pinnate, with two white transverse bands in the center of the forewing from the forefing to the inner margin, and the inner and base of the hindwings are densely covered with long pale yellow hairs, and there are orange-yellow hairs at the end of the abdomen. Ovoid, pale yellow at first birth, dark brown before hatching, banded egg blocks, 20-80 grains each, divided into 2 rows with yellow tail hairs of female worms. The larvae are orange-yellow , 25 mm long , with a brown head , poisonous hairs on the body segments , and a red longitudinal line in the center of the back. Pupae in a cocoon of silk and scales. The pupa is conical in shape and has a light and shiny color.
Eggs
Spherical, light yellow at first birth, dark brown before hatching, banded egg blocks, 20-80 grains each, divided into 2 rows with yellow tail hairs of female insects.
larvae
Orange-yellow, 25 mm long, head brown, toxic hairs on the body segments, red longitudinal line in the center of the back. Pupae in a cocoon of silk and scales.
chrysalis
Conical in shape, light and shiny in color.
Habits of life
Taiwan is born 8-9 generations in 1 year, and the anniversary can be seen in each growth period of individuals. The generation is completed in 24-34 days in summer and 65-83 days in winter. The egg masses are banded, 20-80 grains arranged in 2 rows, and they are attached to the yellow tail hairs. June to July is the peak period, the egg stage is 3 to 19 days, the larval stage is 13-55 days, the pupal stage is 8-19 days, the hatching larvae are inhabited on the plant, and gradually disperse after 3 instars. Adults are phototropic.
The three-instar larvae of the Taiwan yellow poison moth harm eggplant
integrated control
(1) Artificial hunting. From November to March of the following year, pay attention to the removal of overwintering egg blocks; during the growing season, remove the insect leaves when the larvae are infested in clusters at the 1st to 3rd instar stages; cultivate the countryside during the pupal peak period, and partial pupae can be removed.
(2) Biological control. At high humidity, it can be sprayed with 10 billion live spores per gram of borer or cyperges, which is excellent in prevention.
(3) Scientific drug use. In the past, before the larval 3 years of age, 90% crystalline dichlorvosus, or 50% borer pine, or 10% cypermethrin emulsion, or 10% Uranus emulsion 4000 to 6000 times liquid spray control. Now it is generally used 0.5% methylvidate, or 12% methylvidyl acarbonitrile, or methylvidyl asteracene, or methylvidyl acarbonitrile, or chlorpyrifos benzamide, or filogenium diamide, or tetrachlorofenamide. It is best to add synergistic additives such as anabolic when spraying.
Taiwan yellow poison moth harms beans