| Locusta migratoria manilensis(Megen) had the characteristics of clustering and great food intake, which liked eating Gramineae and Cyperaceae plants, such as corn, reeds, sedges, etc. L.migratoria manilensis(Megen) was a valuable raw material resource. In recent years, the breeding of L.migratoria manilensis(Megen) had have a big scale and the application of artificial feed had appeared in production. In order to provide a theoretical basis for handling the maize straw by L.migratoria manilensis(Megen), this paper studied the feeding ability and growth of L.migratoria manilensis(Megen) 3-5rd nymphs and adult on different content of maize straw in artificial feed. And analyzed the decomposition ratio of cellulose and hemicellulose of L.migratoria manilensis(Megen) adult. The main findings were as follows:1. The experiment chose the L.migratoria manilensis(Megen) 5rd nymphs for the test. The results indicated that the effect of feeding increased as water content increasing, and the appropriate water content was 70%. In this water content, the maximum total food intake was 3.57 ± 0.63 g, frass production was 0.68 g, the dry weight of food was 1.17 g, which was the least, the digestibility was 41.38 %, the conversion rate was 28.67%, and the utilization rate was 11.83 %, the weight gain was 0.60 g, which was the maximum; the mortality was 16.67%, and the developmental duration was 9.40 d.2. The suitable maize straw content of the artificial feeding for L.migratoria manilensis(Megen) 3~5rd nymphs and adult were 50%, 60%, 80%, and 80%.The maize straw intake of L.migratoria manilensis(Megen) 3rd nymphs was 0.09 g, total food intake was 0.19 g, and frass production was 0.11 g, as they were eating the food of 50% maize straw content. The digestibility was 28.53%, the conversion rate was 67.12%, and the utilization rate was 19.09%. The weight gain was 4.80 mg/d, the mortality was 18.33%, and the developmental duration was 6.89 d. When parasite dry weight gained 1 Kg, it consumed 2.68 Kg maize straw.When L.migratoria manilensis(Megen) 4rd nymphs eating the food of 60% maize straw content, its maize straw intake was 0.31 g, total food intake was 0.51 g, and frass production was 0.31 g. The digestibility was 37.70%, the conversion rate was 36.17%, and the utilization rate was 11.49%. The weight gain was 5.04 mg/d, the mortality was 15.00%, and the developmental duration was 8.95 d. When parasite dry weight gained 1 Kg, it consumed 6.81 Kg maize straw.The maize straw intake L.migratoria manilensis(Megen) 5rd nymphs was 2.55 g, total food intake was 3.20 g, and frass production was 2.32 g. The digestibility was 25.36%, the conversion rate was 19.96%, and the utilization rate was 5.76%. The weight gain was 66.40 mg/d, the mortality was 15.00%, and the developmental duration was 12.27 d. When parasite dry weight gained 1 Kg, it consumed 3.13 Kg maize straw.In the condition of 80% maize straw content, the maize straw intake, total food intake and frass production of L.migratoria manilensis(Megen) adult were 9.40 g, 11.75 g, and 8.67 g. The digestibility was 26.23%, the conversion rate was 15.13%, and the utilization rate was 3.09%. The weight gain was 11.20 mg/d, the mean fecundity of single female is 37.71, and the life span was 44.63 d. When parasite dry weight gained 1 Kg, it consumed 18.86 Kg maize straw.3. The test had measured the amount of cellulose and hemicellulose in maize straw which were 26.85% and 26.18 %. The content of cellulose and hemicellulose on the frass of L.migratoria manilensis(Megen) adult were 22.75 % and 25.14 %. The decomposition rate of cellulose and hemicellulose were 15.10 % and 3.90 % after eating by L.migratoria manilensis(Megen) adult. The cellulose decomposition rate was higher than the rate of hemicellulose decomposition. |
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