Yigal Cohen

Bar-Ilan University

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Avia E. Rubin

Bar-Ilan University

A. Baider

Bar-Ilan University

M. Reuveni

University of Haifa

U. Gisi

Syngenta (Switzerland)

Helena Eyal

Bar-Ilan University

J. Katan

Hebrew University of Jerusalem

Mariana Galperin

Bar-Ilan University

A. Grinstein

Agricultural Research Organization

Y. Samoucha

Bar-Ilan University

Bat-Hen Ben-Daniel

Bar-Ilan University

Cooperative Institutions

Agricultural Research Organization

535

Hebrew University of Jerusalem

300

Ministry of Agriculture and Rural Development

160

Tel Aviv University

142

Bar-Ilan University

114

Weizmann Institute of Science

Cornell University

Agricultural Research Service

Ben-Gurion University of the Negev

Ministère de l'Agriculture et de la Souveraineté alimentaire

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Extracts of Inula viscosa Control Downy Mildew of Grapes Caused by Plasmopara viticola

Phytopathology (2006)

Yigal Cohen Wenqiao Wang Bat-Hen Ben-Daniel Yigal Ben-Daniel

ABSTRACT The oily paste extracts of Inula viscosa leaves made with organic solvents were effective in controlling downy mildew caused by Plasmopara viticola in detached leaf tissues of grapes in growth chambers. Thin-layer chromatography of such extracts revealed the presence of 11 Rf regions of which four contained highly effective compounds against the disease. Two major inhibitory compounds, each comprising 10.6% of the total paste weight, were identified as tomentosin and costic acid. An emulsified concentrate formulation of the oily paste extracts provided excellent activity against the disease in the field. The effective dose (concentration) required for 90% control of the disease in treated shoots in the field was below 0.125% (paste in water). No seasonal fluctuations were observed in the control efficacy of six extracts made from I. viscosa leaves harvested during the period of May to July. In whole vines, treated and artificially inoculated, the paste concentration required for 90% control of the disease ranged between 0.30 to 0.37%, whereas in naturally infected vines it was 0.58%. It appears that I. viscosa is a valuable source for fungicidal preparations against downy mildew of grapes. This is the first report on the control of a disease with I. viscosa extracts under field conditions.

Plasmopara viticola

10.1094/phyto-96-0417

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Citations (60)

Elicitors and soil management to induce resistance against fungal plant diseases

NJAS - Wageningen Journal of Life Sciences (2011)

Lucius Tamm Barbara Thürig Andreas Fließbach A.E. Goltlieb S. Karavani

Disease management

10.1016/j.njas.2011.01.001

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Citations (47)

European Journal of Plant Pathology (1999)

Yigal Cohen M. Reuveni A. Baider

Plasmopara viticola

Isobutyric acid

Aminobutyric acid

Shikimic acid

10.1023/a:1008734019040

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Citations (106)

Activity of carboxylic acid amide (CAA) fungicides against Bremia lactucae

European Journal of Plant Pathology (2008)

Yigal Cohen Avia E. Rubin Dror Gotlieb

Spore germination

Germ tube

Zoospore

10.1007/s10658-008-9327-9

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Citations (28)

Sporulation of Helminthosporium turcicum on sweet corn: effects of light and sugars

Physiological Plant Pathology (1981)

Y. Levy Yigal Cohen

Darkness

10.1016/s0048-4059(81)80049-5

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Citations (8)

3-Aminobutyric acid induces systemic resistance against peronospore tabacina

Physiological and Molecular Plant Pathology (1994)

Yigal Cohen

Aminobutyric acid

Blue mold

10.1016/s0885-5765(05)80030-x

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Citations (113)

Extracts of killedPenicillium chrysogenum Induce resistance against Fusarium wilt of melon

Phytoparasitica (2001)

Hezhong Dong Yigal Cohen

Dry rot

Melon

10.1007/bf02981861

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Citations (27)

The 5′UTR of CCA1 includes an autoregulatory cis element that segregates between light and circadian regulation of CCA1 and LHY

Plant Molecular Biology (2010)

Alona Ovadia Hilla Tabibian‐Keissar Yigal Cohen David Kenigsbuch

10.1007/s11103-010-9605-8

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Citations (6)

Control of Metalaxyl-Resistant Causal Agents of Late Blight in Potato and Tomato and Downy Mildew in Cucumber by Cymoxanil

Phytopathology (1987)

Yigal Cohen

Metalaxyl

Phytophthora infestans

Pseudoperonospora cubensis

10.1094/phyto-77-1283

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Citations (11)

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

PubMed (2006)

Yuji Oka Bat-Hen Ben-Daniel Yigal Cohen

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.

Meloidogyne javanica

Inula

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Citations (31)