Effect on honey bees of combs exposed to vapour from dichlorvos slow-release strips

Clinch, P. G.

doi:10.1080/00288233.1970.10425519

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…An organophosphate insecticide, Vapona ® (Dichlorvos), is applied between day 7 and 13 during the spring incubation to reduce the rate of parasitism of the first generation of parasitoids by about 67% [ 8 ]. However, the vapor phase of this chemical poses a significant risk to the health of the applicators [ 9 ] and emerging bees [ 8 , 10 ], providing the incentive to develop safer alternatives, such as botanical insecticides.…”

Section: Introductionmentioning

confidence: 99%

Insecticidal Activity of Plant Powders against the Parasitoid, Pteromalus venustus, and Its Host, the Alfalfa Leafcutting Bee

Ong

Chomistek

Dayment

et al. 2020

Insects

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Developing a bee-friendly alternative to traditional insecticides used within commercial environments can contribute to reductions in pesticide exposure experienced by managed bees. We performed acute contact toxicity studies using fifteen plant powders from seven plant families against a parasitoid pest, Pteromalus venustus, and its host, the Alfalfa leafcutting bee (ALB). Ajwain, cinnamon, clove, cumin, fennel, ginger, nutmeg, oregano and turmeric applied at low contact concentrations had sufficient fumigant properties to cause equivalent or higher parasitoid mortality as that obtained with the traditional insecticide. Nutmeg adversely affected adult ALBs at both low and high contact concentrations, thus eliminating it as a candidate. Increasing the contact concentrations did not consistently increase parasitoid control but did increase adverse effects on the ALBs. In addition, the efficacious plant powders significantly reduced the sexual function and fertility of the female parasitoids, a feature not associated with the traditional insecticide. The dual nature of the mechanisms underlying the effects of the plant powders may translate into effective control of the parasitoid populations in the commercial environment. The results reported here support further evaluations of Ajwain, cinnamon, clove, cumin, fennel, ginger, oregano and turmeric as potential botanical insecticides for control of P. venustus.

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Section: Introductionmentioning

confidence: 99%

Insecticidal Activity of Plant Powders against the Parasitoid, Pteromalus venustus, and Its Host, the Alfalfa Leafcutting Bee

Ong

Chomistek

Dayment

et al. 2020

Insects

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show abstract

“…Indoor treatment of commercial incubators using dichlorvos as a fumigant has been successful in the control of Pteromalus venustus Walker (Hymenoptera: Pteromalidae), a parasite of the alfalfa leafcutting bee, Megachile rotundata (F.) (Hymenoptera: Megachilidae) (Hill et al 1984). Dichlorvos is not suitable for fumigating honey bees because it is highly toxic and adsorbs onto beeswax (Clinch 1970). However, formic acid does have good potential for use as an indoor fumigant against honey bee parasites Currie 2004, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of release pattern and room ventilation on survival of varroa mites and queens during indoor winter fumigation of honey bee colonies with formic acid

Underwood

Currie

2007

Can Entomol

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This study examined the effects of indoor fumigation with formic acid on survival of honey bee, Apis mellifera L. (Hymenoptera: Apidae), queens and varroa mites (Varroa destructor Anderson and Trueman (Acari: Varroidae)). A relationship between cumulative formic acid concentration and varroa mite mortality was established for colonies subjected to high-concentration fumigation while held indoors at 2–4 °C during winter. We also examined the effects of the formic acid release pattern and room ventilation rate on queen loss and treatment efficacy during fumigation. Two experiments were conducted in a wintering building. In both experiments, room air had higher formic acid concentrations than hive air. In experiment 1, 50% and 95% of mites were killed when exposed to in-hive concentration × time combinations of 49 ppm × days (CT50 product) and 111 ppm × days (CT95 product), respectively. No queen loss was observed under either the increasing-concentration or constant high concentration fumigation pattern. In experiment 2, 33% of queens were lost when minimum ventilation was used with room air concentrations of 57 ± 8 ppm (mean ± SE), whereas no queens were lost in controls or colonies exposed to room air concentrations of 27 ± 8 ppm with variable ventilation. Queen loss was associated with peak in-hive formic acid concentrations >20 ppm, but not with CT product, suggesting that queens are affected by acute rather than chronic exposure to formic acid. Formic acid fumigation significantly reduced the mean abundance of mites under both minimum- and variable-ventilation treatments.

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Pesticide residues in the pollen and nectar of oilseed rape (Brassica napus L.) and their potential risks to honey bees

Wen¹,

Sun

et al. 2021

Science of The Total Environment

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Effect on honey bees of combs exposed to vapour from dichlorvos slow-release strips

Abstract: An experiment is described in which combs were exposed, for 4 months, to vapour from dichlorvos slow-release strips. The combs absorbed the insecticide and were toxic to honey bees for approximately 1 month after exposure ceased.

Cited by 5 publications

References 4 publications

Insecticidal Activity of Plant Powders against the Parasitoid, Pteromalus venustus, and Its Host, the Alfalfa Leafcutting Bee

Insecticidal Activity of Plant Powders against the Parasitoid, Pteromalus venustus, and Its Host, the Alfalfa Leafcutting Bee

Effects of release pattern and room ventilation on survival of varroa mites and queens during indoor winter fumigation of honey bee colonies with formic acid

Pesticide residues in the pollen and nectar of oilseed rape (Brassica napus L.) and their potential risks to honey bees

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