Effect of aphid feeding reduction on oviposition characteristics of Coccinella septempunctata

doi:10.14088/j.cnki.issn0439-8114.2024.05.008

Abstract

Abstract: In order to clarify the effects of aphid reduced feeding on the egg laying characteristics of the adult Coccinella septempunctata under high density conditions, five aphid reduced treatments of 0, 25%, 50%, 75% and 100% were designed in the experiment, which were A （pure aphids）, B （3-day aphids and 1-day artificial feed）, C （1-day aphids and 1-day artificial feed）, D （1-day aphids and 3-day artificial feed）, and E （pure artificial feed）, respectively. The effects of reduced feeding of aphids on egg production, oviposition location selection, hatching rate and life span of the adult ladybird were analyzed. The results showed that the egg-laying capacity of Coccinella septempunctata in A, B, C, D and E treatments decreased with the decrease of feeding capacity of aphids. There was no significant difference between 25% aphid reduction in treatment B and pure aphid in treatment A. Most of the eggs laid by each treatment of Coccinella septempunctata were collected eggs, and the available utilization rate of eggs was high. Except for the pure feed in treatment E, each aphid reduction treatment had no significant effects on the oviposition location selection, hatching rate and life span of the ladybird. To sum up, treatment B, 25% soybean aphid reduction combined with artificial feed, showed no significant difference in all indicators of high density Coccinella septempunctata compared with treatment A, the pure aphid control, which could be applied to the efficient breeding of Coccinella septempunctata.

Key words: aphid, Coccinella septempunctata, feeding reduction, artificial feed, oviposition characteristics, biological control

CLC Number:

S476⁺.2

PENG Ying-li, YU Jia-min, WANG Yong, LIU Dong-yang, LIU Ting, JIANG Lian-qiang, LONG Gang, LI Bin, XIE Yun-bo, WU Xing-long, GUO Shi-ping, CAI Peng, PU De-qiang. Effect of aphid feeding reduction on oviposition characteristics of Coccinella septempunctata[J]. HUBEI AGRICULTURAL SCIENCES, 2024, 63(5): 45-49.

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