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Journal of Entomology

Year: 2009 | Volume: 6 | Issue: 2 | Page No.: 96-101
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Authors

S.A.A. Fathi

G. Nouri-Ganbalani

H. Rafiee-Dastjerdi

Keywords

Research Article

Life Cycle Parameters of Empoasca decipiens Paoli (Hom.: Cicadellidae) on Four Potato Cultivars (Solanum tuberosum L.) in Iran

S.A.A. Fathi, G. Nouri-Ganbalani and H. Rafiee-Dastjerdi
Empoasca decipiens Paoli (Hom.: Cicadellidae) has been causing damage in potato fields of Ardabil region in Iran. There has been an increasing interest in controlling of E. decipiens using resistant cultivars. The resistance of four commonly planted cultivars including Diamant, Agria, Casmos and Omidbakhsh to E. decipiens was compared using some life cycle parameters of this pest in greenhouse at 24±1°C, 50±5% RH and 16:8 h (L:D) photoperiod. Incubation period, development timeof1st, 2ndand 3rd instar larvae were not significantly different on the cultivars studied. Fourth and 5th instar larvae development time and female and male life span of E. decipiens decreased among the cultivars in the order of Diamant >Casmos >Omidbakhsh >Agria. The percentage of larval survival of E. decipiens on Diamant and Casmos were significantly lower than on Omidbakhsh and Agria. Sex ratio of E. decipiens on four cultivars was not significantly different. High correlation coefficients were observed between the density of simple and glandular trichomes with the percentage of larval survival, larval development time, female and male life span of E. decipiens. These results indicated that among the cultivars that were investigated, Diamant and Casmos were resistant and Omidbakhsh was tolerant to E. decipiens damage. The results of this study also confirmed that the density of glandular trichomes may have more affects on the life cycle of E. decipiens than the density of simple trichomes by restricting larvae and adult feeding. These results are useful in an integrated management program of E. decipiens in potato fields.
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