Feeding preference of Diabrotica speciosa (Ger.) (Coleoptera: Chrysomelidae) by broccoli leaves from natural, organic and conventional farming systems
DOI:
https://doi.org/10.5433/1679-0359.2006v27n1p43Keywords:
Insecta, Farming system, Feeding, Host plant.Abstract
Multiple-choice laboratory tests were achieved to compare feeding preference of Diabrotica speciosa (Ger.) to leaves of broccoli (Brassica oleraceae L. var. italica) from natural, conventional and organic farming systems. Natural farming systems included incorporation of the elephant grass Pennisetum purpureum Schumacher cv. Napier (50 ton/ha), Bokashi compost (1.5 ton/ha) and spray of EM 4 (Natural 1), or the incorporation of the Bokashi compost (1.5 ton /ha) and spray of EM 4 (Natural 2), and in the conventional, NPK + borax were incorporated in the planting + dressing N and organic compost (1 kg/ plant) was incorporated in the organic system. Organic compost was prepared using crop residues of corn (Zea mays L.), soybean [Glycine max (L.) Mer.], and cattle manure. Leaf discs were collected and placed in cages in multiple-choice tests. Beetles preferred mostly broccoli leaves from conventional farming system than leaves from Natural (1 and 2) and Organic farming systems. Feeding on leaves from Natural 1, Natural 2 and Organic farming system were 68, 67 and 57% of the feeding on leaves from Conventional farming system.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Semina: Ciências Agrárias adopts the CC-BY-NC license for its publications, the copyright being held by the author, in cases of republication we recommend that authors indicate first publication in this journal.
This license allows you to copy and redistribute the material in any medium or format, remix, transform and develop the material, as long as it is not for commercial purposes. And due credit must be given to the creator.
The opinions expressed by the authors of the articles are their sole responsibility.
The magazine reserves the right to make normative, orthographic and grammatical changes to the originals in order to maintain the cultured standard of the language and the credibility of the vehicle. However, it will respect the writing style of the authors. Changes, corrections or suggestions of a conceptual nature will be sent to the authors when necessary.