Effects of Transgenic Bt Plus CpTI Cotton on Predating Function Response of Coccinella septempunctata to Aphis gossypii Glover

doi:10.7668/hbnxb.2011.S2.035

Abstract

Abstract: The predating functional response of Coccinella septempunctata with 5 different stages were studied by feeding on the cotton aphids,which were respectively reared on the transgenic(Bt+CpTI) cottons(SGK321) and its parental variety(Shiyuan321) using the biological assay in laboratory condition.The results indicated that the predating functional response matched Holling type II mode.The predating number increased with the prey density,while the searching efficiency decreased with the the prey density.The predating numbers in 80 and 240 in adult and 80 in 2nd instar larvae showed significantly lower than the control cotton while others did not differ significantly to the control cotton.It indicated that the maximum of predating number of the 1st and 3rd instar larvae and adult was higher when compared with control cotton and the controlling of the cotton aphids was stronger than the control cotton.In conclusion,the transgenic Bt plus CpTI cotton appeared little effect on predating function response of Coccinella septempunctata to Aphis gossypii Glover

Key words: Transgenic, Bt+CpTI genes cotton, Aphis gossypii, Glover, Coccinella septempunctata, Predating functional response

CLC Number:

S435
S622.1

LU Yan, XUE Li, ZHOU Zheng-tang, DONG Jin-jin, GAO Xi-wu, SONG Dun-lun. Effects of Transgenic Bt Plus CpTI Cotton on Predating Function Response of Coccinella septempunctata to Aphis gossypii Glover[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(S2): 163-167. doi: 10.7668/hbnxb.2011.S2.035.

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http://www.hbnxb.net/EN/Y2011/V26/IS2/163

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