Effects of planting date and cultivars of sugar beet on curly top virus infection and population of vectors in Isfahan province

Document Type : Research Paper

Authors

1 Plant Pests and Diseases Research Dept., Isfahan Agricultural and Natural Resources Researches Center

2 Sugar Beet Seed Dept., Isfahan Agricultural and Natural Resources Researches Center

Abstract

In order to study the effects of planting date and sugar beet cultivars on infection to curly top virus, vector population, damping off, root rot, and sugar yield, an experiment was conducted in Mobarakeh region during 1999-2000 in a split plot design. The main factor was three planting dates and sub factor was six sugar beet cultivars: IC1 as a susceptible cultivar to beet curly top, T41R, 7233, H5505, PP8 and Attila with 4 replications. The results indicated that delaying in planting date until June, caused decrease of leafhopper population density. The populations of vectors (Circulifer tenellus and C. opacippennis) were the same in all sugar beet cultivars but their population in first planting were higher than the other planting dates and showed significant difference with them. The most infection to BCTV was observed in IC1 in first planting date, and showed significant difference with T41R and Attila at p

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