Apis mellifera and Melipona scutellaris exhibit differential sensitivity to thiamethoxam

Miotelo, Lucas; Reis, Ana Luiza Mendes dos; Malaquias, José Bruno; Malaspina, Osmar; Roat, Thaisa Cristina

doi:10.1016/j.envpol.2020.115770

Cited by 27 publications

(13 citation statements)

References 59 publications

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“…Stingless bees had a sensitivity ratio >1, indicating the higher sensitivity of stingless bees to thiamethoxam than A. mellifera. The acute oral LC 50 for thiamethoxam was 0.227 ng a.i./ µl (ppm) in laboratory tests with female workers of A. mellifera and 0.0543 ng a.i./ µl (ppm) with stingless bee, Melipona scutellaris at 24 hr (Miotelo et al, 2021). These findings support the assertion that stingless bees are more sensitive to thiamethoxam than honey bees.…”

Section: Bioassay Methods II and Iii Did Not Differ Significantlysupporting

confidence: 77%

A Rapid and Easy Bioassay Method for Stingless Bees, <i>Tetragonula travancorica</i> Shanas and Faseeh

Vineetha

Chellappan

Pathrose

2022

ije

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An attempt was made to develop an effective bioassay method for toxicological studies for the stingless bee, Tetragonula travancorica Shanas and Faseeh. The developed bioassay employed stingless bees sampled from the forest area with no history of past insecticide exposure and vegetable ecosystem having frequent insecticide exposure with insecticides viz., chlorantraniliprole and thiamethoxam. A residual film bioassay using pre-treated conical flasks and transferring the bees to the treated flasks in the field itself was easy and less time-consuming. Stingless bees survived for 12 hours in the control flasks with the bioassay method III.Whereas mortality was significantly low in bioassay method I and II within 3h and 6h, respectively.Chlorantraniliprole was less toxic (LC50 – 10.98 ppm to 17.30 ppm) to stingless bees than thiamethoxam(LC50 – 0.30 ppm to 0.78 ppm). Thiamethoxam was highly toxic (LC50 – 0.30 ppm to 0.37 ppm) to beesfrom the forest ecosystem, whereas bees in the vegetable ecosystem were more tolerant (LC50 – 0.67 ppmto 0.78 ppm). The findings may help carry out ecotoxicology and risk assessment studies in stingless bees,a key pollinator of many crops, more rapidly and easily.

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Section: Bioassay Methods II and Iii Did Not Differ Significantlysupporting

confidence: 77%

A Rapid and Easy Bioassay Method for Stingless Bees, <i>Tetragonula travancorica</i> Shanas and Faseeh

Vineetha

Chellappan

Pathrose

2022

ije

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“…The exposure of larvae of the stingless bee Scaptotrigona bipunctata to different doses of chlorpyrifos (Organophosphorus) showed reduced survival probability, likely because they developed into lighter, smaller, and deformed adult workers (Dorneles et al 2021). Exposure to neonicotinoid products during the larval stage has also been shown to cause brain alterations (Miotelo et al 2021). A study of Melipona quadrifasciata anthidioides exposed to the neonicotinoid imidacloprid from larval stages through adulthood showed a survival rate just above 50%; furthermore, imidacloprid exposure impaired the walking behavior of surviving adults, which was attributed to negative effects on the development of mushroom bodies (MBs) in the brain (Tomé et al 2012).…”

Section: Insecticidesmentioning

confidence: 99%

The stingless bees (Hymenoptera: Apidae: Meliponini): a review of the current threats to their survival

et al. 2022

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Pollination by insects is an essential service for the conservation of plant biodiversity, since it increases the rate of fertilization of flowers and therefore increases the quality and quantity of seeds and fruits. In tropical regions, native plants depend heavily on stingless bees as pollinators since before the introduction of the European honey bee Apis mellifera. However, like for many other insect species worldwide, anthropogenic actions represent a true threat to stingless bee populations. In this article, we review the works that evaluated the potential negative impacts of human activities on populations of stingless bees. The studies constitute a strong body of evidence that stingless bee populations are at risk of decline around the world due to threats including habitat loss, agrochemicals, competition for resources, climate change, and the introduction of exotic species, including pathogens.

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“…Our results provide information for the development of further investigations on these organisms as alternatives to improve bee health and to protect bees against pesticides. We selected for this investigation the stingless bee S. postica, which has been studied for inclusion as a model organism in risk assessments (RAs) in the neotropics [17][18][19] . We used thiamethoxam, a neonicotinoid that is commonly used in neotropical crops, as an active ingredient, and dimethoate, the reference standard for toxicity tests.…”

mentioning

confidence: 99%

Fungivorous mites enhance the survivorship and development of stingless bees even when exposed to pesticides

Rosa-Fontana

Dorigo

Malaquias

et al. 2022

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Stingless bees are the largest group of eusocial bees in the world. They play an essential role as crop pollinators and have been considered for inclusion in pesticide risk assessments (RAs). Beyond the mutualism involving stingless bee larvae and fungi, the fungivorous mite Proctotydaeus (Neotydeolus) alvearii proved to be interesting for studies of associations with stingless bees. Their presence is related to colony strength and health, showing a permanent-host-association level. Here, we tested whether the coexistence with P. (N.) alvearii affects stingless bee larvae survivorship and development, including when fed pesticide-dosed food. We chose dimethoate, the reference standard for toxicity tests, and thiamethoxam, widely used in neotropical crops and listed to be reassessed in RAs. Bees associated with the mites showed higher larval survivorship rates, even in the dosed ones, and revealed changes in the developmental time and body size. Our study represents the first approach to stingless bee responses to the coexistence of fungivorous mites inside brood cells, leading us to believe that these mites play a beneficial role in stingless bees, including when they are exposed to pesticides.

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Apis mellifera and Melipona scutellaris exhibit differential sensitivity to thiamethoxam

Cited by 27 publications

References 59 publications

A Rapid and Easy Bioassay Method for Stingless Bees, <i>Tetragonula travancorica</i> Shanas and Faseeh

A Rapid and Easy Bioassay Method for Stingless Bees, <i>Tetragonula travancorica</i> Shanas and Faseeh

The stingless bees (Hymenoptera: Apidae: Meliponini): a review of the current threats to their survival

Fungivorous mites enhance the survivorship and development of stingless bees even when exposed to pesticides

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