Impact of botanical insecticide on Apis mellifera, Nannotrigona testaceicornis and Tetragonisca angustula (Hymenoptera: Apidae) / Impacto de inseticidas botânicos sobre Apis mellifera, Nannotrigona testaceicornis e Tetragonisca angustula (Hymenoptera: Apidae)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

Adverse effects of organo-synthetic products have motivated search in alternative control of pests. Among this alternative, botanical insecticides present a viable option for the management of these organisms. However, before the choice of the botanical insecticide, some criteria must be analyzed, such as: efficiency to control the pest and selectivity to beneficial organisms in the agroecosystem. Intensive use of insecticides to control pests has caused negative impacts on the agents pollinators. Bees Apis mellifera, Nannotrigona testaceicornis and Tetragonisca angustula (Hymenoptera: Apidae) are extremely important in pollination of various crops. Thus, the objective of this work was to evaluate the impacts of botanical insecticides rotenone, Andiroba, garlic extract and oil of Neem, citronella and eucalyptus on A. mellifera, N. testaceicornis and T. angustula. Thus, the toxicity bioassays of botanical insecticides were performed with the A. mellifera, N. testaceicornis and T. angustula. Additionally, tests of food preference and handling behavior were conducted with adults of pollinators. The most toxic insecticide to adults of A. mellifera was the oil of Neem. Rotenone and the oil of citronella were also toxic for larvae of this pollinator. Citronella of oil was the most toxic for T. angustula. None of botanical insecticides studied showed toxicity to N. testaceicornis. All botanical insecticides caused repellency to adults of A. mellifera. In the bioassay of handling behavior, rotenone, oil of eucalyptus, Neem and garlic extract decreased the speed of A. mellifera, but the distance traveled and time of walking were not affected by any of the botanical insecticides tested. Insecticides did not affect the behavior of handling of N. testaceicornis and T. angustula. Our results provide important information for pest management in order to preserve the beneficial pollinators agents present in agroecosystem.

ASSUNTO(S)

pesticidas seletividade selectivity pesticides pollinators polinizadores entomologia agricola

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