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| Articles
by
Mir Jalil Hejazi |
Total Records (
2 ) for
Mir Jalil Hejazi |
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Hooshang Rafiee Dastjerdi
,
Mir Jalil Hejazi
,
Ghadir Nouri Ganbalani
and
Moosa Saber
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This study was carried out to assess the effects of
sublethal dose of profenofos, spinosad, thiodicarb and field recommended
dose of hexaflumuron on demographic and biological parameters of H.
hebetor. Gross reproductive rate in control (68.87) was significantly
higher than insecticide treatments. The highest and the lowest gross reproductive
rate between insecticides were related to the profenofos and spinosad,
respectively. Higher intrinsic rat of increase in control (0.17) compared
with insecticide treatments indicated harmful effects of insecticides
on it. Hexaflumuron and spinosad had the highest (0.15) and the lowest
(0.1) intrinsic rate of increase between insecticides, respectively. Number
of laid eggs was significantly affected by insecticides and it was approximately
2 times more than insecticide treatments in control. In this study, hexaflumuron
had tremendous sublethal negative effects on biological parameters of
H. hebetor with no lethal effects on adult wasps. The female longevity
in control (29.41) had no significant difference with the means of profenofos
and hexaflumuron, but differences between spinosad and thiodicarb with
control was significant. Spinosad had the lowest longevity (12.79). However
hexaflumuron, profenofos and spinosad had lower generation time compared
with control and thiodicarb but differences between treatments were not
significant. Sex ratio of H. hebetor offsprings was significantly
affected by insecticides. In control, it was lowest (39.23) which indicated
that proportion of female to male was highest ( ≈ 2 time) and it
was highest in spinosad (54.94) which means that spinosad caused higher
male production in population. In all treatments, especially spinosad
and thiodicarb, increase in female age caused increase in male production. |
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Hooshang Rafiee Dastjerdi
,
Mir Jalil Hejazi
,
Ghadir Nouri Ganbalani
and
Moosa Saber
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In this research, the effects of profenofos, thiodicarb, hexaflumuron and spinosad were studied on functional response of Habrobracon hebetor to different densities of last instar larvae of Anagasta kuehniella. Two day-old mated females were exposed to LC25 of the insecticides and distilled water as control. Host densities of 2, 4, 8, 16, 32 and 64 were offered to treated females wasps for 24 h in 10 cm petri dishes. Experiments were conducted in 8 replications and were carried out in controlled conditions, 26± 2°C, 70± 5% RH and 16:8 (L:D) h. The type of functional response was determined using logistic regression and the parameters, searching efficiency (a) and handling time (Th) were estimated by non-linear regression using SAS software. Functional response was type II in control and all of insecticide treatments. Searching efficiency in control and insecticide treatments were 0.0935, 0.0132, 0.0511, 0.0864 and 0.0905 h-1 and handling times were 0.4542, 1.0646, 0.5381, 0.5275 and 0.4896 h, respectively. The maximum attach rates (24/Th) were estimated 22, 52, 44, 45 and 49, respectively. Spinosad and hexaflumuron had the most and the lowest effect on searching efficiency of H. hebetor, respectively. |
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