Abstract
Phytophagus coccinellid belong to Epilacchninae sub-family are very different the other coccinellid, and found in tropical and subtropical regions of the world. Henosepilachna elaterii Rossi. feeds on plants of Cucurbitacae family in groups in Europe, Africa and Asia. This pest is found the south Europe, Mediterranean regions, and south of Center Europe. Henosepilachna elaterii is a serious pest of watermelon and cantaloupe, and is a common pest in Aegean region and Southeastern Anatolia Region of Turkey. This species is a vector as different virus disease from health plant to disease plant. This study was carried out to determine biological parameters of Henosepilachna elaterii Rossi. (Coleoptera: Coccinellidae) feeded on watermelon cultivars (Surme, Galactica, Crimson sweet, Crimson tide and Sugar baby). The trials were made in laboratory conditioned at 16:8 h (day:night) and in 65 ± 5 % relative humidity at 25 ±1 oC temperature. Data was collected on effect of host plants cultivars on preadult periods. Total development time at prematuring period was shortest at 25 ± 1°C on Crimson tide cultivar as 24.41 days and longest as 25.01 days on Surme cultivars.
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