Effect of Beauveria bassiana Dose on Temperature Preference in Franklinie occidentalis

doi:10.16409/j.cnki.2095-039x.2022.01.004

Abstract

Abstract: Beauveria bassiana is an important biocontrol fungus with high pathogenicity to Frankliniella occidentalis. The temperature preference (T_p) of F. occidentalis varied with infection by B. bassiana, which is of great significance in the control of F. occidentalis using B. bassiana. This study analyzed the effect of B. bassiana dose on the temperature preferrence of F. occidentalis over time. The results showed that, within the time range of observation (from 0 to 120 h, except 48 h), the T_ps of F. occidentalis infected with high-dose B. bassiana were significantly lower than those of the individuals infected with low-dose of the fungi. Compared with the T_p of the healthy F. occidentalis (24 ℃±0.5 ℃), that of the infected thrips decreased first and then increased with time regardless of the fungal doses. The T_ps of thrips in the two groups first decreased from 0 to 48 h and then increased gradually (from 48 to 120 h). The copy number of fungal genes in the thrips infected with high-dose B. bassiana was greater than that of the thrips infected with low-dose fungi. Over time, the difference increased. This study provides support for the establishment of an efficient control program of F. occidentalis.

Key words: Beauveria bassiana, Frankliniella occidentalis, preference temperature, dose

CLC Number:

S476.1

LI Xinhua, ZHANG Li, LIU Sheng, LEI Zhongren, WU Shengyong, WANG Haihong. Effect of Beauveria bassiana Dose on Temperature Preference in Franklinie occidentalis[J]. Chinese Journal of Biological Control, 2023, 39(1): 62-68.

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