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- Title
MORTALIDADE DE ABELHAS SEM FERRÃO Scaptotrigona bipunctata SOB OS EFEITOS DOS HERBICIDAS PARAQUAT E DIQUAT.
- Authors
Carvalho Peruzzolo, Marina; Grange, Luciana; Ronqui, Ludimilla
- Abstract
Bees have essential pollinating activities and are fundamental to the maintenance of the ecosystem since they also pollinate various agricultural systems. There are growing reports about the disappearance of bees, possibly due to the intense use of pesticides, which do not have their effects on biodiversity fully known. Most studies in this area are aimed at understanding the effects of insecticides; however, herbicides can also influence the mortality of pollinating insects. Regarding the paraquat and diquat herbicides, widely used in agriculture, little is known about the effects on non-target organisms, such as bees. This work evaluated the mortality of Scaptotrigona bipunctata bees submitted to the paraquat and diquat herbicides via contact and ingestion. Two experiments were conducted in a randomized block design in a 2 x 2 factorial scheme with additional treatment, in three replications. The treatments were: two herbicides (paraquat and diquat), two doses (50 and 100%), and an additional treatment without contamination (control). Each plot consisted of ten individuals exposed to treatments and incubated at 28 °C for 72 hours in a controlled environment. For the ingestion experiment, both doses of the herbicides resulted in higher bee mortality when compared to the control condition. In addition, the 100% dose resulted in greater toxicity when compared to the 50% dose. For contact contamination, there was no increase in bee mortality on exposure. It can be concluded that contamination by ingestion of paraquat and diquat can affect the survival of stingless bees, which in the long term may alter the viability and population dynamics of Scaptotrigona bipunctata bees.
- Publication
Arquivos de Ciências Veterinárias e Zoologia da Unipar, 2021, Vol 24, Issue 1, p1
- ISSN
1415-8167
- Publication type
Article
- DOI
10.25110/arqvet.v24i1cont.2021.8408