The effects of imidacloprid, indoxacarb and deltamethrin on some biological and demographic parameters of Habrobracon hebetor Say (Hymymenoptera: Braconidae) in adult stage treatment

Abstract :

The effect of field recommended doses of imidacloprid, indoxacarb, and deltamethrin (290, 125, and 83 ppm based on active ingredient, respectively) were studied on some biological and demographic parameters of adult Habrobracon hebetor Say. The experiments were conducted at 26±1°C, 60±5% RH, and a photoperiod of 12 L:12 D h. Thirty, one-day-old females were treated using paper disc method for 24 h. Distilled water plus Triton X-100 was used in control treatment. Females survived in each treatment were transferred individually to 6 cm Petri dishes. One adult male was added to each Petri dish for mating. Three last instar larvae of Anagasta kuehniella (Zeller) were offered to each female daily as host. The number of eggs produced per female per day were counted until all of the females died. Stable population growth parameters were estimated using Carey's (1993) procedure. Gross and net reproductive rates in control and imidacloprid, indoxacarb, and deltamethrin treatment were 206.31±13.38 and 73.46±5.5; 186.82±21.39 and 46.81±6.52; 164.71±14.47 and 51.75±5.22; 102.39±9.84 and 19.95±2.56, respectively. Mean generation time and doubling time in control and insecticidal treatments were 21.22± 0.2 and 3.43±0.04; 22.49±0.32 and 4.07±0.13; 21.87±0.31 and 3.85±0.06; 22.41±0.36 and 5.21±0.2, respectively. Intrinsic rate of increase and finite rate of increase were estimated 0.2023±0.0025 and 1.2242±0.0031; 0.1706±0.0054 and 1.186±0.0064; 0.1802±0.0027 and 1.9746±0.0033; 0.1332±0.0052 and 1.1425±0.0059, respectively. Deltamethrin had the most adverse effect on stable population parameters of this wasp (P<0.05). There was no significant difference between indoxacarb and imidacloprid in this regard.

Keyword :

Insecticides, Habrobracon hebetor, biology, demographic parameters

Author(s) : Sarmadi, S., Nouri-Ganbalani, G., Rafiee-Dastjerdi, H., Hassanpour, M., Pour Abad, R. F.
Downloads : 2960
Published Issue : 2010 Vol. 5 Number 2

2010 Vol. 5 Number 2