Related Experiment Video
Updated: May 13, 2026
Methodology for Developing Life Tables for Sessile Insects in the Field Using the Whitefly, Bemisia tabaci, in Cotton As a Model System
Published on: November 1, 2017
Time-dose-mortality data and modeling for the entomopathogenic fungus Aschersonia placenta against the whitefly
Junzhi Qiu1, Feifei Song, Lihui Mao
1Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian, People's Republic of China.
Abstract:
The fungus Aschersonia placenta FJSM was evaluated for control of the sweet potato whitefly, Bemisia tabaci. Bemisia tabaci nymphs (1st-4th instars) on tomato plants in the greenhouse (25-27 °C, 70%-85% relative humidity) were sprayed with suspensions containing 0, 10(4), 10(5), 10(6), 10(7), or 10(8) A. placenta FJSM conidia/mL. Mortality of fungus-treated 1st to 3rd instar nymphs ranged from 93% to 100% but was <25% for 4th instar nymphs; the fungus sporulated from 70% to 80% of the fungus-treated B. tabaci cadavers. LD50 and LD90 values decreased with time after treatment and increased with instar. LT50 values decreased with conidial concentration. The data were then described with time-dose-mortality models. The results indicate that A. placenta FJSM has potential as a mycoinsecticide for control of B. tabaci.
