›› 1996, Vol. 39 ›› Issue (3): 233-237.

• RESEARCH PAPERS • Previous Articles     Next Articles

RELATIVE FITNESS OF FENVALERATE RESISTANT ANDSUSCEPTIBLE STRAINS OF HELICOVERPAARMIGERA (HUBNER)

Wu Yidong Shen Jinliang Tan Fujie You Ziping   

  • Online:1996-08-20 Published:1996-08-20

Abstract: The effects of fenvalerate resistance on fitness in Helicoverpa armigera(Hubner) were evaluated in terms of developmental and reproductive characteristics.Life tables of Fen-R strain (fenvalerate-resistant) and S strain (susceptible) were also constructed to determine relative fitness by net reproductive rate (Ro). The results indicated that Fen-R strain possessed reproductive disadvantages including percentage of females mated, lower mean number of eggs per female laid and decreased percentage of eggs hatching when compared with the S strain. No developmental defect of Fen-R strain was observed. The Fen-R strain was calculated to have a fitness value of 0.69 relative to the susceptible S strain.

Key words: Helicoverpa armigera (Huibner), fenvalerate, resistance, relative fitness