Aptitud biológica de poblaciones de Bemisia tabaci (Gennadius) Biotipo B (Hemiptera: Aleyrodidae) con diferente susceptibilidad al insecticida thiametoxam / Fitness of Bemisia tabaci (Gennadius) B Biotype (Hemiptera: Aleyrodidae) populations with different levels of susceptibility to the thiametoxam insecticide
Neotrop. entomol
;
39(3): 430-435, May-June 2010. tab, ilus
Article
in Spanish
| LILACS
| ID: lil-556530
ABSTRACT
In two field-collected populations of de Bemisia tabaci (Gennadius) B biotype previously selected with the neonicotinoid insecticide thiamethoxam (NEO-R, NEO-N), and a population susceptible to insecticides (SUSC), the level of response to the insecticide thiametoxam, as well as the life and fertility tables were determined. At LC95, the NEO-R population showed a resistance ratio (RR95) value of 8.8-fold, an intrinsic rate of increase (r m) of 0.72. The fitness of the NEO-R and NEO-N populations in relation to the SUSC was 1.5 and 2.0, respectively. The RR95 value for NEO-N was 1.9-fold; it's r m value was 0.082, while in the SUSC population was 0.041. The developmental time of egg and adult were longer in NEO-R population, while the nymph and pupa lasted longer in the NEO-N and SUSC populations. The developmental time was different in the three NEO-R, NEO-N, and SUSC populations with 19.7 d (315.84 degree days or dd), 15.7 d (250.4 dd) and 18.5 d (296.6 d), respectively. The populations previously selected with thiamethoxam did not reproduce faster than their susceptible counterpart.
Full text:
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Index:
LILACS (Americas)
Main subject:
Oxazines
/
Thiazoles
/
Hemiptera
/
Insecticides
/
Nitro Compounds
Limits:
Animals
Language:
Spanish
Journal:
Neotrop. entomol
Journal subject:
Biology
/
ZOOLOGIA
Year:
2010
Type:
Article
Affiliation country:
Chile
/
Mexico
Institution/Affiliation country:
Colegio de Postgraduados/MX
/
Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias/MX
/
Universidad de Concepción/CL
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