title: Time-dose-mortality data and modeling for the entomopathogenic fungus Aschersonia placenta against the whitefly Bemisia tabaci.
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.
authors: Key Laboratory of Biopesticide and Chemical Biology, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, 350002 Fujian, People's Republic of China.
authors: Junzhi
authors: J
authors: Qiu
authors: Feifei
authors: F
authors: Song
authors: Lihui
authors: L
authors: Mao
authors: Jie
authors: J
authors: Tu
authors: Xiong
authors: X
authors: Guan
mesh_terms: D000818:Animals; D006430:Hemiptera / Q000382:microbiology*; D006999:Hypocreales / Q000502:physiology*; D007928:Lethal Dose 50; D008954:Models, Biological; D009758:Nymph / Q000382:microbiology; D010572:Pest Control, Biological / Q000379:methods*; D016019:Survival Analysis; D013997:Time Factors