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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fitness costs associated with milbemectin resistance in the two-spotted spider mite Tetranychus urticae

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Author(s):
Nicastro, Roberto Lomba [1] ; Sato, Mario Eidi [1] ; da Silva, Marcos Zatti [1]
Total Authors: 3
Affiliation:
[1] Inst Biol, Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF PEST MANAGEMENT; v. 57, n. 3, p. 223-228, 2011.
Web of Science Citations: 7
Abstract

The two-spotted spider mite Tetranychus urticae Koch is one of the most important pests of a wide range of crops worldwide. Its control is still largely based on the use of acaricides. However, due to its short life-cycle, high fecundity and arrhenotokous reproduction, it is able to develop resistance to these compounds very rapidly. Preliminary studies for milbemectin resistance in T. urticae showed that, under laboratory conditions, such resistance was unstable in the absence of a selection pressure. The aim of this study was to evaluate the possible fitness costs associated with milbemectin resistance in T. urticae. Comparison of biological traits between resistant and susceptible strains indicated the occurrence of fitness costs associated with milbemectin resistance. The resistant strain showed a longer juvenile development period for females, lower fecundity and a higher proportion of males among the progeny. The figures for net reproductive rate (R(0)), intrinsic rate of natural increase (r(m)) and finite rate of increase (lambda) were higher in the susceptible strain. The instability of milbemectin resistance can be exploited in resistance management programmes. (AU)

FAPESP's process: 07/02748-1 - Resistance of Tetranychus urticae Koch to milbemectin and abamectin acaricides and management of strawberry and ornamental plants pest mites using predatory mites from Phytoseiidae family
Grantee:Roberto Lomba Nicastro
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 07/08612-4 - Studies on pesticide resistance on thrips (Frankliniella occidentalis) and mites (Tetranychus urticae), in several crops, and host preference of these pests on ornamental plants in the State of São Paulo
Grantee:Mário Eidi Sato
Support Opportunities: Regular Research Grants
FAPESP's process: 09/08789-7 - Influence of predaceous mites of the family Phytoseiidae on interactions among vector mite, leprosis virus and citrus plant
Grantee:Marcos Zatti da Silva
Support Opportunities: Scholarships in Brazil - Post-Doctoral