Development of insect pest management strategies in hybrid rice.
2009
Majidi Shilsar, Farzad | Osku, Taraneh | Hashemi, Zaman
Evaluation of susceptibility or resistance of Hybrid rice with four cultivars to SSB were carried out in screen -house condition at IIRR during 2006 .Results showed that infected SSB on Hybrid rice was 11/8 percentage based on system standard evaluation. For managing this pest on Hybrid rice, we tested various methods of control against SSB, 2006-2007. Indexes of evaluation were number of larvae, number of Dead hearts, white heads and yield in various treatments. Experiment showed that D. h was 0.6 to 5/7 percentage in vegetative stage and W. h was from 1.83-12.37 percentage . The highest infection observed in check treatment and late-planted with 12.37 and 11.28 percentage, receptively. The highest of yield was in integrated, releasing of Trichogramama wasp with use of granular Diazinon(10%) about 7500 and 7337.5 kg/ha in 2007 and 2008, respectively. At least of yield observed in check and late-planted with 4500 and 4375 kg/ha during this time. Damage average of early planting was remarkable less late planting. The revealed showed that when don't accomplish control none, the yield severely is decreased. This research showed that more suitable of method is mixed release of Trichogramma wasps with spray of Diazinon granular.By the way ,if Hybrid rice early is planted( max. 30 April) can be escape from generation 3th SSB. Average of crop loss due to in early planting in comparison with late planting was less remarkable.
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