Journal of Food, Agriculture and Environment

Evaluation of the reaction of Alisma plantago-aquatica and some rice cultivars to Curvularia lunata in the north of Iran

Author(s):

Mohammad Reza Safari Motlagh *, Armin Javadzadeh

Recieved Date: 2010-08-20, Accepted Date: 2010-12-02

Abstract:

Alisma plantago-aquatica is considered as one of the most important weeds in paddy fields. In this research Curvularia lunata was isolated from Alisma plantago-aquatica and was evaluated as its biological control agent. Here, three indigenous rice cultivars (landraces) such as Hashemi, Ali Kazemi and Binam and two modified cultivars, i.e. Sepidroud and Khazar, were used at a complete random design (CRD) with 3 replications in greenhouse. Plants at the 3-4-leaf stage were inoculated with 10⁶ conidia per ml to run-off with 1% Tween-20. Results indicated that the disease rating of Curvularia lunata in Hashemi and Ali Kazemi was more than of other cultivars, while Sepidroud and Khazar cultivars, though affected, were more tolerant. Furthermore, by studying traits such as dry weight, fresh weight and height, it was found that in reaction to the fungus, the height of indigenous rice cultivars did not have any significant decrease; however, dry and fresh weights of Sepidroud and Khazar cultivars showed a significant decrease. Also the height of Alisma plantago-aquatica in reaction to inoculation with the fungus did not show such a significant decrease and the same results were found for the dry and fresh weight of the said weed after inoculation with the above-mentioned fungus. Nevertheless, the disease rating index of this weed was significant compared with that of rice cultivars. Therefore, Curvularia lunata can be recommended as a mycoherbicide for controlling Alisma plantago-aquatica.

Keywords:

Alisma plantago-aquatica, Curvularia lunata, biological control

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Agriculture
Pages: 828-831

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