Activity of Dimilin® (TH 6040) Against Coleoptera in Stored Wheat and Corn1

McGregor, Harrison E.; Kramer, Karl J.

doi:10.1093/jee/69.4.479

Cited by 36 publications

(18 citation statements)

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“…CSIs, such as diflubenzuron, are very effective at controlling populations of a variety of insect species, for example pests of stored grain (Carter, 1975;McGregor & Kramer, 1976). Some of the newer compounds such as triflumuron (Mian & Mulla, 1982a), teflubenzuron (Ammar, 1988) and chlorfluazuron (Ishaaya et al, 1984;Nawrot et al, 1986;Ammar, 1988;Elek & Longstaff, 1994) are even more effective than diflubenzuron at killing these pests, including those that feed inside the grain.…”

Section: Introductionmentioning

confidence: 99%

Treatment of adult Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Elek

1998

Entomologia Exp Applicata

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A group of insect growth regulators, the chitin synthesis inhibitors (CSIs), are being more widely used as many insects have become resistant to broad-spectrum insecticides. This study investigated the mode of action of one CSI, particularly looking at the delayed effect of treating adult insects on the survival and development of their progeny. The study describes the responses of adult stored grain beetles Sitophilus oryzae (L.) (Curculionidae) and Rhyzopertha dominica (F.) (Bostrichidae) to wheat treated with chlorfluazuron. For both species, wheat treated with chlorfluazuron reduced progeny survival at a constant rate from 1 day to 8 weeks after it had been treated. There was a direct, negative concentration-time relationship between the treatment of the adults with chlorfluazurontreated wheat and the survival and developmental rate of their progeny. Adults that were pre-exposed for one or more weeks before oviposition to wheat treated with chlorfluazuron had significantly lower progeny survival than adults that were not pre-exposed. The EC 95 values were 16-fold higher for R. dominica and 40-fold higher for S. oryzae from assays without pre-exposure, than with pre-exposure. Pre-exposure of R. dominica with 0.1 mg kg −1 and of S. oryzae with 0.4 mg kg −1 of chlorfluazuron reduced progeny survival by 95%. Higher concentrations of chlorfluazuron produced a reduction in mean population developmental time of several days. These findings have important implications for bioassays of CSIs, since pre-exposure of the adults can significantly reduce the numbers of F1 progeny. Therefore standard bioassays may seriously underestimate the efficacy of the CSI being assayed.

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Section: Introductionmentioning

confidence: 99%

Treatment of adult Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Elek

1998

Entomologia Exp Applicata

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“…Experiments with a large variety of juvanoid-type IGRs for inhibiting brood production have repeatedly shown the scolytids to be extremely resistant to these materials (Slama et a l . granarius (L.), exhibit a prolonged inhibition of progeny production after an initial 3 week exposure to Dimilin-containing diet (McGregor and Kramer 1976). Dimilin has been shown to control field populations of A .…”

Section: Resultsmentioning

confidence: 99%

PROLONGED INHIBITION OF BROOD PRODUCTION IN DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE) BY DIMILIN

Sahota

Ibaraki

1980

Can Entomol

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Can. Ent. 112: 85-88 (1980) Pre-attack feeding for 48 h on a diet containing 200 ppm Dimilinm (diflubenzuron), by adult Dendroctonus rufipennis (Kirby) (Coleoptera: Scolytidae), caused a complete inhibition of larval eclosion from eggs deposited by such beetles in the untreated host logs for the duration of the reproductive cycle. Inhibition of larval eclosion was mediated through the females only. Pre-attack application of 1% Dimilin to host logs reduced the number of larvae per gallery by 55% and reduced the number of galleries with successful larval eclosion by 42%. ResumeLe nourrissement pendant 48 heures avant I'attaque de Dendroctonus rufipennis (Kirby) (Coleoptera: Scolytidae) avec une dikte contenant 200 ppm de Dimiline, a cause l'inhibition complkte de I'Cclosion des larves des oeufs pondus par ces insectes dans les billes-h6tes durant tout le cycle de reproduction. Cette inhibition s'est transmise seulement par les femelles. L'application de Dimiline a 1% aux billes-h6tes avant l'attaque y a rtduit de 55% le nombre de larves par galerie et de 42% le nombre normal de galeries avec I'6closion des larves.

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“…Its ovicidal effect is achieved either by direct application onto eggs [39, 49, 50] or by treatment of insects at any life stage [25, 51–53]. BPU-treated immature stages and adults derived from them frequently lay fewer and nonviable eggs when compared to their untreated counterparts [54–59]. This occurs by full or partial disruption of both embryogenesis and gonads development of both sexes [51–53].…”

Section: Discussionmentioning

confidence: 99%

Triflumuron Effects on the Physiology and Reproduction ofRhodnius prolixusAdult Females

Henriques

Genta

Mello

et al. 2016

BioMed Research International

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We evaluated the efficacy of the growth regulator triflumuron (TFM) in inducing mortality and disrupting both oviposition and egg hatching in Rhodnius prolixus adult females. TFM was administered via feeding, topically or by continuous contact with impregnated surfaces. Feeding resulted in mild biological effects compared with topical and impregnated surfaces. One day after treatment, the highest mortality levels were observed with topical surface and 30 days later both topical and impregnated surfaces induced higher mortalities than feeding. Oral treatment inhibited oviposition even at lower doses, and hatching of eggs deposited by treated females was similarly affected by the three delivery modes. Topical treatment of eggs deposited by nontreated females significantly reduced hatching. However, treatment per contact of eggs oviposited by untreated females did not disrupt eclosion. Additionally, oral treatment increased the number of immature oocytes per female, and topical treatment reduced the mean size of oocytes. TFM also affected carcass chitin content, diuresis, and innate immunity of treated insects. These results suggest that TFM acts as a potent growth inhibitor of R. prolixus adult females and has the potential to be used in integrated vector control programs against hematophagous triatomine species.

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Activity of Dimilin® (TH 6040) Against Coleoptera in Stored Wheat and Corn1

Cited by 36 publications

References 0 publications

Treatment of adult Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

Treatment of adult Coleoptera with a chitin synthesis inhibitor affects mortality and development time of their progeny

PROLONGED INHIBITION OF BROOD PRODUCTION IN DENDROCTONUS RUFIPENNIS (COLEOPTERA: SCOLYTIDAE) BY DIMILIN

Triflumuron Effects on the Physiology and Reproduction ofRhodnius prolixusAdult Females

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