Article

Control of Meloidogyne javanica by Formulations of Inula viscosa Leaf Extracts.

Nematology Unit, Gilat Research Center, Agricultural Research Organization, M. P. Negev 85280, Israel Agrogene Ltd., Kibbutz Kramim 84963, Israel Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan 52900, Israel.
Journal of nematology (Impact Factor: 1.08). 04/2006; 38(1):46-51.
Source: PubMed

ABSTRACT

Inula viscosa is a perennial plant that is widely distributed in Mediterranean countries. Formulations of I. viscosa extracts were tested for their effectiveness in control of Meloidogyne javanica in laboratory, growth chamber, microplot, and field experiments. Oily pastes were obtained by extraction of dry leaves with a mixture of acetone and n-hexane or n-hexane alone, followed by evaporation of the solvents. Emulsifiable concentrate formulations of the pastes killed M. javanica juveniles in sand at a concentration of 0.01% (paste, w/w) or greater and reduced the galling index of cucumber seedlings as well as the galling index and numbers of nematode eggs on tomato plants in growth chamber experiments. In microplot experiments, the hexane-extract formulation at 26 g paste/m(2) reduced nematode infection on tomato plants in one of two experiments. In a field experiment, a reduction of 40% in root galling index by one of two formulations was observed on lettuce plants. The plant extracts have potential as a natural nematicide, although the formulations need improvement.

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    • "terials including free ammonium gases, nitrate, sulfur gases and organic acids are produced. Such materials kill nematodes directly or reduce egg hatching. It may also make some chemical and physical changes in the soil and subsequently increase the amount of phosphorus, potassium and sodium of soil, improving the plant growth (Dropkin et al., 1958). Oka et al. (2006showed that soil amendment can considerably reduce the population density of M. javanica by altering the soil pH. Ability of an antagonist microorganism to colonize the plant root is an important factor in biological control (Schroth and Hancock, 1982). It is necessary to provide a favorable environmental condition to enhance the effecti"

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