Data/hora: 16/06/2024 09:22:20

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 18/03/2016
Data da última atualização: | 18/04/2016
Autoria: | TIAN, J.; DIAO, H.; LIANG, L.; ARTHURS, S.; HAO, C.; MASCARIN, G. M.; MA, R.
Afiliação: | JING TIAN, SHANXI AGRICULTURAL UNIVERSITY, China; HONGLIANG DIAO, SHANXI AGRICULTURAL UNIVERSITY, China; LI LIANG, SHANXI AGRICULTURAL UNIVERSITY, China; STEVEN ARTHURS, UNIVERSITY OF FLORIDA, USA; CHI HAO, SHANXI AGRICULTURAL UNIVERSITY, China; GABRIEL MOURA MASCARIN, CNPAF; RUIYAN MA, SHANXI AGRICULTURAL UNIVERSITY, China.
Título: | Host plants influence susceptibility of whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) to the entomopathogenic fungus Isaria fumosorosea (Hypocreales: Cordycipitaceae).
Ano de publicação: | 2016
Fonte/Imprenta: | Biocontrol Science and Technology, v. 26, n. 4, p. 528-538, 2016.
DOI: | 10.1080/09583157.2015.1129393
Idioma: | Inglês
Conteúdo: | We quantified the tritrophic effect of host plant on the susceptibility of the sweetpotato whitefly Bemisia tabaci (Genn.) to a fungal pathogen in the laboratory. Second-instar whiteflies reared on cucumber, eggplant, tomato and bean plants for six generations were exposed to conidial suspensions of Isaria fumosorosea isolate IF-1106. Our results did not detect differences in response (proportional survival or median lethal time, LT50 days) among insect populations derived from different plants that were treated with 107 conidia/ml. However, at concentrations <- 5×106 conidia/ml, whiteflies reared on bean and tomato died significantly more quickly (i.e. LT50 of 4?5 days) compared with cucumber and eggplant reared populations (5?7 days). Bean and tomato-reared populations were also more susceptible to mycosis (LC50 = 6 × 105 conidia/ml) compared with those reared on cucumber (1.9 × 106 conidia/ml) and eggplant (1.5 × 106 conidia/ml). A separate study confirmed that this differential response of whitefly populations to I. fumosorosea was not explained by differences in deposition rate of conidia on leaf surfaces (i.e. a dosage effect). Our findings show that host plants affect the pathogenicity and virulence of a herbivore pathogen, but depend on the rate of exposure (inoculum) applied.
Thesagro: | Bemisia tabaci; Fungo entomogeno; Mosca branca.
Thesaurus Nal: | Isaria fumosorosea.
Categoria do assunto: | O Insetos e Entomologia
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (34099-1) - UPC - AP - DD - 2016 -  - 2016 - DIS