Effect of Supplementation of Artificial Diet before Storage on Cold Tolerance of Coccinella septempunctata

doi:10.16409/j.cnki.2095-039x.2020.05.006

Abstract

Abstract: Coccinella septempunctata is an important biocontrol agent and play critical roles in many biological control programs. In order to explore the effect of supplementation of artificial diet before storage on the cold tolerance of C. septempunctata, in this study, the newly emerged adults were fed with artificial diet (called AD) or pea aphid (served as control, and called AP) and then their post-storage fitness was measured after being stored at 6℃ for different periods. After that, the cold tolerance of the two treatments was evaluated. The results showed that the survival of AD adults decreased with prolonged storage and decreased to 80% at 60 days after storage, but AP adults had sustained high survival (>95%) during the whole storage periods, and survival of AP-45 was significantly higher than that of AD-45. The weight loss of AD adults was greatly decreased with prolonged storage, but was less than AP. AD-60 still had relatively high reproductive capabilities (number of oviposition was 46.4, and egg hatch rate was 80.6%), which were similar to those of AP-60. These results indicated that artificial diet could be used as an effective alternative pre-storage diet, and would play important roles in further developing cost-effective storage techniques.

Key words: cold storage, Coccinella septempunctata, artificial diet, biological control

CLC Number:

S476.2

SUN Yuanxing, HAO Yanan, LI Mingling. Effect of Supplementation of Artificial Diet before Storage on Cold Tolerance of Coccinella septempunctata[J]. Chinese Journal Of Biological Control, 2020, 36(5): 708-713.

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