0 a large insect found in hot areas that flies in large groups and destroys plants and crops -- 蝗虫
a swarm of locusts 一大群蝗虫
During the dry season the locusts could be approached nearer than during the rains, owing to their inactivity when the humidity is low.
Various grasses were introduced into the cage to determine whether the locusts exhibited a preference for any particular species of grass.
At this point, villages were teetering on the brink of famine as locust invasions threatened to consume the limited food crops that had been planted.
The wing femur and pronotum-depth head-width ratios were determined for locusts collected in 1930, 1931, 1932 and 1933.
After the preliminary work, a programme was drawn up which included a study of both phases of the desert locust.
In the countryside, the absence of government measures to ensure pest control made farmers' efforts to deal with a swarm of locusts futile.
The chronicles tell us about such natural phenomena as rainy years, periods of drought, famines, locust plagues, and epidemics.
Treated locusts reared in field cages or in the laboratory can be used to confirm the field data.
