Reproductive Deficiencies Associated with Pyrethroid Resistance in the Tobacco Budworm (Lepidoptera: Noctuidae)

B.F. McCutchen, F.W. Plapp, Jr., H.J. Williams, and D.A. Kostroun


 
ABSTRACT

Mating deficiencies relating to pyrethroid resistance were studied in adult tobacco budworms, Holiothis viresnens (F.). In field tests, susceptible (S) females attracted more males than resistant (R) females. The effect was density dependent and greater at low insect concentrations. Spermatophore counts confirmed the greater reproductive success of S females and gas chromatographic measurements showed S females produced more pheromone than R females. Field tests showed S males were more attracted to pheromone traps than R males. These difference in mating success show that R tobacco budworms are at a strong competitive disadvantage compared to S insects. These mating deficiencies probably contribute to successful pyrethroid resistance management in the field.



Reprinted from Proceedings: 1989 Beltwide Cotton Research Conferences pp. 364 - 366
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998