Deterrência alimentar em Ascia monuste orseis Godart (Lepidoptera: Pieridae) induzida por soluções homeopáticas
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2015-03-18
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Revista Ceres
Resumo
A couve, Brassica oleracea var. acephala, destaca-se entre as plantas hortícolas como sendo frequentemente atacada por pragas, dentre as quais o curuquerê da couve, Ascia monuste orseis (Godart, 1819) (Lepidoptera: Pieridae). O controle desse inseto tem sido feito com inseticidas. Na agricultura orgânica, o uso dos referidos produtos é proibido e já existem alguns casos em que agricultores estão substituindo-o, por outras alternativas menos danosas ao meio ambiente, como as soluções homeopáticas, substâncias apontadas como ferramentas para Agroecologia. Este trabalho teve por objetivo verificar se soluções homeopáticas proporcionam mecanismos de antibiose, como deterrência alimentar, em Ascia monuste orseis, em couve 'manteiga cv. Santo Antônio' e se podem ser utilizadas no controle de pragas. As soluções testadas foram: - Sulphur 12CH; Phosphorus 5CH; Magnesia carbonica 30CH; Ruta 5CH. A testemunha foi água destilada + álcool de cereais 70% 5CH. Para o preparo de cada solução, foram retirados 0,2 ml de cada preparado homeopático, adicionados a 200 ml de água destilada pulverizados nas folhas e nos solo dos vasos. As características analisadas foram peso de lagartas no início e no final do 4° instar; peso seco de pupa (biomassa incorporada), comprimento de lagarta no 4° instar, duração do ciclo ovo-adulto, percentagem de emergência de adultos, comprimento alar, fecundidade das fêmeas e valor nutritivo das couves tratadas. Sulphur 12CH pode ser recomendado como método alternativo eficiente no controle de A. monuste orseis. Todas as soluções homeopáticas, com exceção do Phosphorus 5CH, promoveram deterrência alimentar, mecanismo de antibiose, interferindo no ciclo biológico de A. monuste orseis.
The kale, Brassica oleracea var. acephala , stands out among vegetables for being frequently by pests, in particular the leafworm kale, Ascia monuste orseis (Godart, 1819) (Lepidoptera : Pieridae ). The control of this insect has been carried out using insecticides. In organic agriculture, the use of these products is prohibited and there are already some examples where farmers are replacing their use for other alternative forms, less harmful to the environment, such as homeopathic solutions, which are substances identified as a tool to Agroecology. The objective of this study was to determine whether homeopathic solutions provide antibiosis mechanism, such as food deterrence in Ascia monuste orseis in 'manteiga cv. Santo Antonio' kale and whether they could be used to control pests. The solutions tested were as follows: Sulphur 12CH; Phosphorus 5CH ; Magnesia carbonica 30 CH; Ruta 5CH. The control was distilled water + grain alcohol 70% 5CH. For the preparation of each solution, 0.2 ml was taken from each homeopathic preparation, added to 200 ml of distilled water, sprayed onto the leaves and soil in the pots. The traits analyzed were as follows: weight of caterpillars at the beginning and end of the 4th instar; dry weight of pupa (incorporated biomass); length of the caterpillar at the 4th instar; length of egg to adult cycle, percentage of adult emergence; wing length; fecundity of the females and nutritive value of the treated kales. Sulphur 12CH can be recommended as an effective alternative method to control A. monuste orseis. All homeopathic solutions, except Phosphorus 5CH , promoted feeding deterrence, antibiosis mechanism, interfering with the biological cycle of A. monuste orseis.
The kale, Brassica oleracea var. acephala , stands out among vegetables for being frequently by pests, in particular the leafworm kale, Ascia monuste orseis (Godart, 1819) (Lepidoptera : Pieridae ). The control of this insect has been carried out using insecticides. In organic agriculture, the use of these products is prohibited and there are already some examples where farmers are replacing their use for other alternative forms, less harmful to the environment, such as homeopathic solutions, which are substances identified as a tool to Agroecology. The objective of this study was to determine whether homeopathic solutions provide antibiosis mechanism, such as food deterrence in Ascia monuste orseis in 'manteiga cv. Santo Antonio' kale and whether they could be used to control pests. The solutions tested were as follows: Sulphur 12CH; Phosphorus 5CH ; Magnesia carbonica 30 CH; Ruta 5CH. The control was distilled water + grain alcohol 70% 5CH. For the preparation of each solution, 0.2 ml was taken from each homeopathic preparation, added to 200 ml of distilled water, sprayed onto the leaves and soil in the pots. The traits analyzed were as follows: weight of caterpillars at the beginning and end of the 4th instar; dry weight of pupa (incorporated biomass); length of the caterpillar at the 4th instar; length of egg to adult cycle, percentage of adult emergence; wing length; fecundity of the females and nutritive value of the treated kales. Sulphur 12CH can be recommended as an effective alternative method to control A. monuste orseis. All homeopathic solutions, except Phosphorus 5CH , promoted feeding deterrence, antibiosis mechanism, interfering with the biological cycle of A. monuste orseis.
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Brassica oleracea, Controle alternativo, Homeopatia, Lepidóptera, Phosphorus, Sulphur