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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 71, No. 3, 2011, pp. 395-400
Bioline Code: cj11048
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 71, No. 3, 2011, pp. 395-400

 en EVALUATION OF RESISTANCE OF CUCUMBER CULTIVARS TO THE VEGETABLE LEAFMINER ( Liriomyza sativae check for this species in other resources Blanchard) (DIPTERA: AGROMYZIDAE) IN GREENHOUSE
Basij, Moslem; Askarianzaeh, Alireza; Asgari, Shahriyar; Moharramipou, Saeid & Rafezi, Ramin

Abstract

The leafminer, Liriomyza sativae check for this species in other resources Blanchard, is distributed around the world and is an important pest of vegetables and ornamentals. Given the resistance potential of the leafminer to current insecticides, the use of resistant plant cultivars and parasitoids could be effective integrated pest management (IPM) strategies against it. Cucumber ( Cucumis sativus check for this species in other resources L.) is a preferred host for this insect. Seventeen cultivars of cucumber have been evaluated to study resistance mechanisms to L. sativae. All cucumber cultivars were evaluated in screening tests in greenhouse with indices such as the number of leafminer stings, the number of larval mines, the proportion of larval mines to leafminer stings, and the rate of injury. Significant differences (p < 0.01) were found among cultivars, as well as significant correlations among all evaluated indices. Cucumber cultivars were ranked by the cluster method based on all measured characters and were classified into four groups: susceptible, semi-susceptible, semi-resistant, and resistant. Trials of antibiosis resistance of cucumber cultivars were conducted in a growth chamber and were evaluated with biological indices of insect activity including oviposition period, larval and pupal duration, percentage of larval and pupal mortality, and the sex ratio among selected cultivars. Significant differences were found for all indices except pupal weight and the sex ratio. The cultivars were analyzed by the cluster method based on all measured characters and were divided into three groups including sensitive, slightly resistant, and semi-resistant. No cultivar was immune to injury.

Keywords
Cucumber cultivar, screening, antibiosis, Cucumis sativus

 
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