Abstract: A comparative study was made on the survival rates of invasive pest Frankliniella occidentalis and indigenous pest Frankliniella intonsa at their different development stages after exposure to high and low temperatures. After 2 and 4 hours exposure to high temperatures (36 ℃, 38 ℃, 40 ℃, 42 ℃, and 44 ℃), the survival rates of the two pests at their different development stages decreased with increasing temperature, but F. occidentalis at the same high temperatures had a higher survival rate than F. intonsa. After 2 and 4 hours exposure to low temperatures (-2 ℃, -4 ℃, -6 ℃, -8 ℃, and -10 ℃), the survival rates of the two pests at their different development stages decreased with decreasing temperature, but the survival rate of F. occidentalis at the same low temperatures was also higher than that ofF. intonsa. The results indicated that the adaptation capabilities of the two pests to high and low temperature were significantly different. F. intonsa was more sensitive, while F. occidentalis was more adaptable to adverse temperature.

Key words: Pasture and agriculture transitional zone, System productivity, Ecological reconstruction, Grass/Livestock industries