Document Type : Pest Management
Authors
Abstract
Khuzestan is the most important sesame (Sesamum indicum) growing province in Iran.In recent years, out break of sesame phyllody (SP) hase inflicted heavy losses to sesame crop in this province. In a survey in 2000 and 2001 in sesame growing regions of Khuzestan the rate of infection was 0.5 to 100 percent.Infected tissue showed positive reaction with dienes stain and on the basis of this result,SP disease has phytoplasmatal etiology.Among various leaf hoppers collected from sesame fields,only Circulifer haematoceps transmitted the disease agent.The effect of five sowing dates (June 8, 22 July 6, 16and 28) and spraying with Metasistox -R on SP and crop yield was evaluated in Hamidieh.The experiment consisted of a split plot randomized complete block design with three replications. The results showed that spraying had no significant effect on the yield although the rate of infection was significantly decreased at 5% level. Date of planting had significant effect on the yield (at 5% level) and disease incidence rate (at 1% level). Highest yield and lowest disease incidence were obtained with the latest sowing date (July 28) plus spraying
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