Phytoparasitica (2001) 29, p. 270 (Pivonia et al.)

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S. Pivonia, R. Cohen, S. Cohen, J. Kigel, Rachel Levita and J. Katan (2001)
Reduction of melon sudden wilt incidence by manipulating the irrigation regime
Phytoparasitica 29 (3), 270-270
22nd Congress of the Israeli Phytopathological Society, February 12-13, 2001, Bet Dagan, Israel, poster
Abstract: The effect of irrigation regimes on disease expression in melon plants infected by Monosporascus cannonballus was studied during two summer growing seasons in the Arava Valley of southern Israel. In both experiments, reduced irrigation treatments, postponed the onset of plant collapse, reduced the rate of disease progress and lowered disease incidence. Postponement of disease progress in infested fields by lowering irrigation frequency and quantity allowed crop harvest before plant collapse, but reduced yield compared with that harvested in disease-free plots with similar irrigation regimes. The yield harvested from melon grown under reduced irrigation in the infected plots was improved due to lowering of the disease incidence, but fruit quantity and quality were relatively low due to water shortage. The delay in plant collapse under the reduced irrigation treatments was associated with development of a deeper root system. Roots of the daily-irrigated plants reached a depth of 25 cm and the main root system was concentrated in the upper 15-cm soil layer. In the reduced irrigation treatment roots penetrated to a depth of 40 cm and were uniformly distributed throughout the soil profile. It is suggested that the change in root growth pattern improved plant ability to overcome the increasing water demand of the maturing diseased plant.
Database assignments for author(s): Jaacov Katan, Shimon Pivonia

Research topic(s) for pests/diseases/weeds:
control - general
environment - cropping system/rotation

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Monosporascus cannonballus Melon (Cucumis melo) Israel