Characteristics of locusts.

The best answer: the length of male adult locust is 35.5~41.5 mm, and that of female adult locust is 39.5~51.2 mm. The body is usually green or yellow-brown, which often varies due to environmental factors. Vertical face, pale yellow antennae. The midline of the anterior chest back plate is well developed, and the scattered type is slightly curved from the side, while the social type is slightly concave, with dark longitudinal stripes on both sides. The front wing is long and narrow, often exceeding the middle of the tibiofibular joint of the rear foot, with brown and dark markings and deep social type. The hind wings are colorless and transparent.

1. The length of male adult locust is 35.5 ~ 41.5mm, and that of female adult locust is 39.5 ~ 51.2mm.. The body is usually green or yellow-brown, which often varies due to environmental factors. Vertical face, pale yellow antennae. The midline of the anterior chest back plate is well developed, and the scattered type is slightly curved from the side, while the social type is slightly concave, with dark longitudinal stripes on both sides. The front wing is long and narrow, often exceeding the middle of the tibiofibular joint of the rear foot, with brown and dark markings and deep social type. The hind wings are colorless and transparent. Sometimes, there are two inconspicuous dark stripes on the upper side of the hind leg of the social type, while the scattered type often disappears or is inconspicuous. The hindfoot tibiofibular segment is usually orange-red, and the social type is slightly light, with 10~11 thorns along the outer edge.

2. Locusts generally belong to facultative diapause insects, and most of them overwinter with their eggs in the oocysts in the soil, while only a few species, such as Acridoidea Japonicus and Acridoidea brevipoda, overwinter as adults. The number of generations in a year depends on the biological characteristics of the species, the annual effective accumulated temperature, food, light and the growth and development of each insect stage in different areas. For example, the Asian migratory locust occurs once a year in the distribution area of China. Locusta migratoria manilensis has two generations in the middle and lower reaches of the Yangtze River and its north distribution area in China, while the high temperature and drought years in the river and Huaihe River basins are three generations or incomplete three generations. 4~5 generations in south China. The Chinese rice locust is one generation in the Yangtze River and its north area, and two generations in the south of the Yangtze River.

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