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Extratos Naturais na Patogenicidade e Reproducao de Meloidogyne exigua em Cafeeiro e de Meloidogyne incognita Raca 3 em Feijoeiro



Extratos Naturais na Patogenicidade e Reproducao de Meloidogyne exigua em Cafeeiro e de Meloidogyne incognita Raca 3 em Feijoeiro



Nematologia Brasileira 27(1): 41-48



Vegetable extracts from Syzigium aromaticum (L.) Merr & Perry, Cinnamomum zeylanicum Breyn, Bixa orellana L. and of Controlmix probiotic were evaluated for their effects on pathogenicity and reproduction of Meloidogyne incognita race 3 on beans, as well as of Meloidogyne exigua on coffee, in the greenhouse. Extract o Melia azedarach L. was also evaluated on coffee. Extracts were prepared by water infusion. Each bean plant received 30 mL extract and 5400 M. incognita race 3 eggs. Each coffee plant received 30 mL extract and 3000 M. exigua eggs. The evaluation was made at 35 and 100 days after nematode inoculation in bean and coffee, respectively. M. incognita race 3 population in beans was reduced (P<=0.05) by the extract application compared to control, without any increase in dry matter and plant height. M. exigua population in coffee was reduced (P<=0.05) by the extract application of C. zeylanicum, B. orellana and Controlmix probiotic compared to control, without any increase in dry matter and plant height. However, extract from Syzigium aromaticum flower and leaves of Melia azedarach increased (P<=0.05) the M. exigua population on coffee. A significant reduction in M. exigua and M. incognita race 3 populations observed in plants treated with the C. zeylanicum extract, indicated a high level of substances toxic to nematodes in this plant tissue.

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