Resistance of Greenhouse Cucumber Cultivars to Vegetable Leafminer, Liriomyza sativae (Dip.: Agromyzidae), in Greenhouse

Vegetable leafminer, Liriomyza sativae Blanchard, is a serious pest of cucumber in the greenhouses of Iran. In the present study seven currently-in-use cucumber cultivars (Afzal, Jannet, Caspian, Khasib, Nasim, Radiant and Storm) were evaluated for resistance to L. sativae. Antibiosis was measured using some life-history indices in the greenhouse conditions (27 ± 2 °C, 60 ± 5% RH and 16:8h L:D) in a completely randomized design. Results showed significant differences among the cultivars in some life-history indices of L. sativae. Janet and Storm cultivars had the longest larval developmental time (6.78 and 6.69 days, respectively) and highest larval mortality (19.29 percent), comparing to the other cultivars. Janet showed the lowest pupal weight (324.7µg). Based on the cluster analysis, cultivars were classified into three different groups (from the highest to the lowest levels of resistance) as group 1 (Afzal, Jannet and Storm), group 2 (Caspian and Khasib) and group 3 (Nasim and Radiant). Thus, the highly resistant cultivars such as Afzal, Jannet and Storm would be useful in integrated management programs of L. sativae.