Nontarget Effects of Ivermectin on Coprophagous Insects in Japan

Iwasa, Mitsuhiro; Nakamura, Takahide; Fukaki, Kyoko; Yamashita, Nobuo

doi:10.1603/0046-225x-34.6.1485

Cited by 31 publications

(32 citation statements)

References 32 publications

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“…Papp (1970) investigated the level of productivity of Muscidae, Sepsidae, and Sphaeroceridae and specifically reported on the high dung-decomposing ability of Muscidae having a larger body size. Dry body weights of major coprophagous flies in dung of treated cattle were reduced to 5.9% (Iwasa et al, 2005a) and to 21.7% (Iwasa et al, 2005b) of those of the control cattle in field trials using ivermectin. The present dry weights of major coprophagous flies in dung of treated cattle were reduced to 67.2% of those of the control cattle, and the effect of moxidectin against flies taking an active part as dung decomposers in the field is fairly small in comparison with that of ivermectin.…”

Section: Discussionmentioning

confidence: 93%

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Effects of moxidectin on coprophagous insects in cattle dung pats in Japan

Iwasa

Suzuki

Maruyama

2008

Appl. Entomol. Zool.

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Effects of the antiparasitic drug moxidectin were studied in laboratory and field experiments in Hokkaido, Japan by pour-on administrations (500 mg/kg) on a target pest Haematobia irritans Linnaeus, nontarget coprophagous flies represented by Neomyia cornicina (Fabricius), and the dung beetle Caccobius jessoensis Harold. The concentration of moxidectin excreted into cattle dung was maximum at 3 days post-treatment both in the first and second trials, and then it diminished. No moxidectin was detected on or after day 21 post-treatment in the first trial, and on or after day 28 post-treatment in the second trial. Larval development of H. irritans was hampered from 1 to 7 days post-treatment. No N. cornicina pupated in dung at days 1 and 3 post-treatment, and pupation and emergence rates were reduced in the dung until 7 days post-treatment. There were no significant differences in numbers and weight of brood balls constructed by Caccobius jessoensis in dung from treated and control cattle. Adult emergence rates of C. jessoensis on days 1, 3, 7, 14 post-treatments were not significantly different between control and treated groups, and more than 90% of adult emergence rates were demonstrated in both groups. In the field study using emergence traps, 3,433 (18 families) flies emerged from dung from untreated control cattle and 1,667 (16 families) flies emerged from dung from treated cattle. Notably, the number of Sciaridae spp. (first Experiment) and Sepsis latiforceps Duda and Sphaeroceridae spp. (second Experiment) significantly decreased in dung pats of treated cattle. From 48 dung pats in the field experiments, total dry weight of major coprophagous flies that emerged was 1,741.8 mg in dung from control cattle and 1,170.0 mg in dung from treated cattle, showing 32.8% reduction in treated dung. Emergence rates of C. jessoensis from brood balls recovered from soil beneath dung pats in the field experiments were not significantly different between dung from control and treated cattle on each sampling day (1, 7, 14, and 21 days) post-treatment.

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Section: Discussionmentioning

confidence: 93%

“…Iwasa et al (2005b) also suggested a possibility for increased emergence of some Nematocera in the treated group through the growth inhibition of other fly larvae produced by ivermectin residues in cattle dung. However, there may be no such observation in the Nematocera in the dung of cattle treated with moxidectin.…”

Section: Discussionmentioning

confidence: 94%

Effects of moxidectin on coprophagous insects in cattle dung pats in Japan

Iwasa

Suzuki

Maruyama

2008

Appl. Entomol. Zool.

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“…In particular, ivermectin has been widely used by a convenient ''pour-on'' application method, and it is effective not only against endoparasites, but also ectoparasites. However, it has been reported that ivermectin persists in dung of cattle and inhibits the growth of coprophagous dung-degrading insects, causing delays in dung degradation (Fincher 1992;Floate 1998;Floate et al 2002Floate et al , 2005Iwasa et al 2005aIwasa et al , 2005bIwasa et al , 2007Madsen et al 1990;Strong 1992Strong , 1993Strong and Wall 1994;Wall and Strong 1987). This phenomenon will increase the fouled grassland with reduction of available forage and affect nutrient recycling on pastures by dung-degrading insects, and it could lead to undesirable consequences on the pasture ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Effects of the veterinary antiparasitic drug eprinomectin on dung beetles (Coleoptera: Scarabaeidae), the non-pest fly Neomyia cornicina and pest fly Haematobia irritans (Diptera: Muscidae) in Japan

Iwasa

Sugitani

2014

Appl Entomol Zool

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Effects of the antiparasitic drug eprinomectin were studied in the laboratory and field experiments in Hokkaido, Japan, by pour-on administrations (500 lg/kg) on the pest fly Haematobia irritans (Linnaeus), nontarget coprophagous fly Neomyia cornicina (Fabricius), and the dung beetles Caccobius jessoensis Harold and Liatongus minutus (Motschulsky). Eprinomectin excreted into cattle dung was highest at 3 days post-treatment in both experiments, then it declined rapidly at 7 days and was not detected on or after day 14 post-treatment. In laboratory experiments, pupation and emergence rates of H. irritans and N. cornicina were hampered from 1 to 14 days posttreatment. There were no significant differences in the numbers of brood balls constructed by C. jessoensis in dung from treated and control cattle. Adult emergence rates of C. jessoensis were significantly reduced on days 1 and 3 post-treatment in dung from treated cattle. There were no significant differences in the numbers of brood balls constructed by L. minutus in dung from treated and control cattle, but survival rates of larvae were significantly reduced on days 1 and 3 post-treatment. In field experiments, the numbers of brood balls by L. minutus recovered from beneath dung pats were significantly larger in number in dung from treated cattle, suggesting that adult beetles are attracted to dung pats from treated cattle. Survival rates of larvae in these brood balls of L. minutus were significantly reduced 1 day post-treatment in dung pats from treated cattle, and equivalent levels to the control were restored 7 days post-treatment. The results are discussed in relation to the effects of endectocides on nontarget insects in grazing pastures.

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“…This causes structural changes of the saprophytic community through a reduction of species diversity and increase in dominance of less susceptible species. For example, emergence of the dung beetle Liatongus minutus and eight species of flies from cowpats in the first two weeks following ivermectin treatment at normal rates (0.5 mg/kg body weight) was significantly reduced, while Ceratopogonidae and Psychodidae species prospered (Iwasa et al 2005). These impacts can occur while lethal levels of residues persist in the dung -usually 1-3 weeks for most pyrethroids and avermectins in cowpats (Krüger and Scholtz 1997), but shorter times in sheep dung.…”

Section: Soil Communitiesmentioning

confidence: 99%

Ecological Impacts of Insecticides

Sánchez‐Bayo¹

2012

Insecticides - Advances in Integrated Pest Management

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Nontarget Effects of Ivermectin on Coprophagous Insects in Japan

Cited by 31 publications

References 32 publications

Effects of moxidectin on coprophagous insects in cattle dung pats in Japan

Effects of moxidectin on coprophagous insects in cattle dung pats in Japan

Effects of the veterinary antiparasitic drug eprinomectin on dung beetles (Coleoptera: Scarabaeidae), the non-pest fly Neomyia cornicina and pest fly Haematobia irritans (Diptera: Muscidae) in Japan

Ecological Impacts of Insecticides

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