Nutrition physiological parameter changes of Locusta migratoria manilensis (Meyen) infected with Metarhizium anisopliae

Key Words：wordsLocusta migratoria manilensis, Metarhizium anisopliae, temperature, growth and development, food consumption

Abstract：      We investigated changes in the nutritional physiological parameters of Locusta migratoria manilensis (Meyen) infected with Metarhizium anisopliae at 18, 21, 24, 27 and 30℃. Total food consumption of 3rd-5th instar nymphs infected with M. anisopliae was 96.4, 108.3, 131.9, 103.2 and 249.5 mg respectively. The total food consumption of infected adults at 21, 24, 27 and 30℃, was 931, 1218, 109.0 and 237.5 mg, respectively for males, and 108.7、195.5、234.7、114.7 mg for females. The approximate digestive efficiency of infected nymphs decreased, and conversion efficiency increased, with increasing temperature, the latter being a negative value at lower temperatures. There were no significant differences in the approximate digestive efficiency of infected male adults, but that of infected female adults decreased after initially rising. The conversion efficiency of infected male adults decreased from 24 to 30℃, but that of infected female adults did not. The total food consumption of infected locusts was much less than that of CK locusts. We also studied changes in the food consumption of different developmental stages; the daily food consumption of CK nymphs increased at constant temperature and that of female adults was higher than that of male adults. Changes in the total food consumption of CK locusts were the same as changes in daily food consumption. However, there was no obvious relationship between these paramenters in locusts infected with M. anisopliae.