Effects of Different Carotene Concentrations and Feed Preparation Methods on Larvae of Coccinella Septempunctata

doi:10.11924/j.issn.1000-6850.casb2021-0067

Abstract

Abstract:

To determine the effects of different carotene contents and artificial feed preparation methods on the larvae of Coccinella Septempunctata, the larvae of C. Septempunctata were fed with artificial feed composed of different concentrations of carotene and other components, the developmental period, pupa rate, adult number and weight of the larvae and pupa were evaluated and analyzed. The results showed that larvae fed with 50 mg/kg carotene and other components had the pupa formation rate of 75.00%±5.00%(n=20), the adult rate of 71.75%±2.00%(n=20) and the larval stage of (11.68±0.10) d (n=20), which were significantly higher than those of other feeding groups, while the body weight was (0.0325±0.0007) g(n=20), which was significantly lower than that of feeding groups, and the pupa stage was (3.70±0.11) d (n=20), which had no significant difference with other groups. The pupa stage and body weight of C. Septempunctata larvae fed with dry powder diet and sugared water was (3.80±0.06) d (n=20) and (0.0357±0.0006) g (n=20), which had no significant difference with those of C. Septempunctata larvae fed with paste diet and sugared water as (3.55±0.10) d (n=20) and (0.0345±0.0010) g (n=20), respectively. However, the pupa rate was 57.50%±2.00%(n=20) and the adult rate was 41.25%±5.00%(n=20) of the group fed with dry powder diet and sugared water, which were significantly higher than those fed with paste diet respectively, 18.00%±2.00%(n=20) and 17.00%±2.00%(n =20), while the larva stage (9.93±0.17) d (n=20) was significantly lower than that of the paste diet feeding group (11.68±0.16) d (n=20). The adult rate and pupa rate of C. Septempunctata larvae fed on the artificial diet with the concentration of 50 mg/kg carotene are significantly higher than those of other combinations, and the dry powder artificial diet is significantly better than the paste artificial diet. The study establishes a combination of good feed for C. Septempunctata larvae and its preparation method.

Key words: Coccinella septempunctata, carotene, artificial feed, biological control, larva

CLC Number:

S476+.2

Lu Qiucheng, Liu Dongyang, Wang Yong, Xu Jinlan, Jiang Lianqiang, Liu Chao, Cai Peng, Li Yuejian, He Hengguo, Pu Deqiang. Effects of Different Carotene Concentrations and Feed Preparation Methods on Larvae of Coccinella Septempunctata[J]. Chinese Agricultural Science Bulletin, 2021, 37(35): 82-87.

Figures/Tables 4

References 22

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处理组	发育历期/d
处理组	幼虫期	蛹期
A	10.68±0.18(n=19)	3.95±0.07(n=19)
B	10.23±0.17(n=20)	3.88±0.07(n=20)
C	9.93±0.17(n=20)	3.80±0.06(n=20)
D	10.45±0.17(n=20)	3.80±0.12(n=20)
E	11.68±0.10(n=20)**	3.70±0.11(n=20)
H	11.68±0.16(n=20)**	3.55±0.10(n=20)
CK	10.28±0.10(n=20)	3.85±0.19(n=20)

处理组	发育历期/d
处理组	幼虫期	蛹期
A	10.68±0.18(n=19)	3.95±0.07(n=19)
B	10.23±0.17(n=20)	3.88±0.07(n=20)
C	9.93±0.17(n=20)	3.80±0.06(n=20)
D	10.45±0.17(n=20)	3.80±0.12(n=20)
E	11.68±0.10(n=20)**	3.70±0.11(n=20)
H	11.68±0.16(n=20)**	3.55±0.10(n=20)
CK	10.28±0.10(n=20)	3.85±0.19(n=20)