Biological and environmental dynamics of insect growth regulators (IGRs) as used against Diptera of public health importance

Mian, Lal S.; Mulla, Mir S.

doi:10.1007/978-1-4612-5756-1_2

Cited by 38 publications

(25 citation statements)

References 116 publications

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“…Dilute solutions of DFB were not stable in field waters and that in tap waters stability was least when both pH and water temperature were relatively high [18]. Previous studies show that DFB normally persists for only about 2 to 3 days [18,47,48]. Low concentrations can persist for 7 weeks or longer in pond waters under low pH and temperatures [49].…”

Section: Discussionmentioning

confidence: 94%

Experimental Study on Diflubenzuron: Degradation in Freshwater and Bioconcentration in Mosquitofish Following Chronic Exposure

Zaidi¹,

Farine²,

Soltani³

2013

JEP

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Diflubenzuron (DFB, trade name dimilin ® 25 WP) is a chitin synthesis inhibitor widely used against forest insect pests in Algeria. Prior to implementation of these products as chemical agents for mosquito control, knowledge on their potential effects on non-target organisms and its behaviour in water are needed. Therefore, the present study was focused on DFB and aimed to use an HPLC procedure developed previously in order to obtain information on its degradation in freshwater and its bioconcentration in adult females of the fish Gambusia affinis (Cyprinodondiformes, Poeciliidae), which is one of the best candidates for biological control programs against mosquitoes. The adult females were exposed to dimilin ® (initial concentration 312 ng a.i./ml) for 28 days and residues analysis determined at different exposure times (0, 7, 14, 21 and 28 days). The concentration of DFB in freshwater decreased with exposure time while the amount of residues detected at the surface of the fish body increased progressively to reach a maximum at day 14 (162.7 ± 14.0 ng/fish) and declined thereafter during the exposure period. In addition, DFB incorporation into body increased with decreasing DFB concentration in water at each exposure time. The following average distribution was noted at the end of experiment (28 days): about 33% of the applied concentration was detected on the surface of fish body and was recovered by simple rinsing, and about 67% was found inside the fish body. A degradation in water and surface of fish occurred starting day 14 during the experimental period. Thus, about 40% of the initial concentration was degraded in freshwater after 28 days. The results are discussed to develop a better understanding of the degradation of dimilin in water and their potential effect on non-target organisms for its application for controlling mosquito.

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Section: Discussionmentioning

confidence: 94%

Experimental Study on Diflubenzuron: Degradation in Freshwater and Bioconcentration in Mosquitofish Following Chronic Exposure

Zaidi¹,

Farine²,

Soltani³

2013

JEP

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“…israelensis de Barjac (Bti) and smethoprene (Mian & Mulla 1982, Russell & Kay 2008. Bti is a soil-dwelling bacterium and s-methoprene is an insect growth regulator.…”

Section: Introductionmentioning

confidence: 99%

Environmental effects of mosquito insecticides on saltmarsh invertebrate fauna

Russell¹,

Kay²,

Skilleter³

2009

Aquat. Biol.

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Despite the fact that Bacillus thuringiensis var. israelensis de Barjac (Bti) and s-methoprene are considered to be among the most target-specific of insecticides, there are some indications that non-target organisms may be impacted in different ecosystems. We examined the effects of Bti and s-methoprene on non-target aquatic and terrestrial fauna in 2 subtropical saltmarshes approximately 30 km apart. The main taxa collected from ephemeral pools were copepods and from terrestrial plots were springtails (Collembola), mites (Acariformes) and ants (Hymenoptera), with smaller numbers of beetles (Coleoptera), true bugs (Heteroptera) and flies (Diptera). Following applications of both products, inconsistent short-term (< 20 d) differences in the composition of the arthropod community were noted. After applications of Bti to ephemeral pools, smaller numbers of copepods were recorded but at only one locality. There were no significant effects of s-methoprene on the arthropods in ephemeral pools at either locality. The numbers of mites increased in terrestrial plots after applications of s-methoprene at both localities and Bti at one locality, but these effects were short-lived and varied depending on which specific habitat was sampled (i.e. vegetation or sediment surface). There were few significant effects on any other taxa and these effects were also localised and short-lived. These results suggest that applications of Bti and s-methoprene do not impact the abundance and composition of non-target arthropod assemblages in subtropical saltmarshes, although more work on potential sub-lethal effects of the insecticides is needed.

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“…A group of IGRs are benzoylphenylurea (BPU) compounds that interfere with insect growth, disturb molting, and deform the cuticle (Mian and Mulla, 1982;Reynolds, 1987). Because of their selectivity properties and efficacy on immature stages, BPUs can be used in Integrated Pest Management (IPM) programs (Wright and Retnakaran, 1987;Moser et al, 1992).…”

mentioning

confidence: 99%

Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron

Mahmoudvand

Abbasipour

Garjan

et al. 2012

Chilean J. Agric. Res.

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The oligophagous pest Plutella xylostella (L.) is a major crucifer pest in Tehran Province, Iran. Hexaflumuron is an insect growth regulator insecticide with good effects on immature insect stages. The objective of this study was to investigate the effects of two sublethal concentrations (LC10 and LC25) of hexaflumuron on some biological parameters of P. xylostella larvae, such as birth rate (b), death rate (d), finite rate of increase (λ), generation time (T), sex ratio, pupation rate, and adult emergence. Results showed that hexaflumuron decreased the total number of eggs and oviposition and post-oviposition periods, pupation, and adult emergence in the treated generation, b, and λ. Hexaflumuron also increased T, d, and the preoviposition period. However, sex ratio, percentage of pupation, and adult emergence in the offspring generation were not affected by hexaflumuron. Overall, these results indicated that sublethal concentrations of hexaflumuron can affect the biological parameters of P. xylostella.

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Biological and environmental dynamics of insect growth regulators (IGRs) as used against Diptera of public health importance

Cited by 38 publications

References 116 publications

Experimental Study on Diflubenzuron: Degradation in Freshwater and Bioconcentration in Mosquitofish Following Chronic Exposure

Experimental Study on Diflubenzuron: Degradation in Freshwater and Bioconcentration in Mosquitofish Following Chronic Exposure

Environmental effects of mosquito insecticides on saltmarsh invertebrate fauna

Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron

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