The comparison of some treatment methods to control Melanophila picta Pall on the willow trees in urban green space
Paper ID : 1858-24IPPC (R3)
Authors
1PhD Student, Department of Entomology, Varamin-Pishva Branch, Islamic Azad University, Varamin, Tehran, Iran
2Assistant Professor, Department of Plant Protection, Varamin-Pishva Branch, Islamic Azad University, Varamin, Tehran, Iran
3Plant Protection Research and Consultation Center of Green Space Administration in district 17th., Municipality of Tehran Iran
Abstract
Annually, large numbers of trees are exposed to damage caused by xylophagous pests. Melanophila picta Pall is one of the most important pest of unfruitful trees in green spaces. In this paper, the efficiency of some current controlling treatments was evaluated in Qoran green space, 17th. municipality area of Tehran city, through 2020-21. Treatments included 4 methods of bonding (Dichlorus + Bordeaufix + Mel powder + glue), Dorsban 1%, integrated method (Dorsban 1% +Benomyl 0/5 +Plastic nylon) and control with no treatment. Tests were conducted through second half of June in both years, on three willow trees for each treatment. The mean of larval tunnels and dead adults were recorded after treatments in late September and the percentage of dead branches was considered as the index of efficiency. Data were statistically analyzed by SPSS 26 using GLM method and the means compared by Duncan test. Mean of adult dead was significantly different and the highest mean of dead adults was observed for the integrated method, as 3.45± 0.84 adults. Mean of larval tunnel was significantly different and the most larval tunnel were recorded as 32.2 ± 0.72 tunnels for the integrated method and the least for bonding as 21.08±0.59 tunnels and Dorsban as 21.5±0.32 tunnels. It would be suggested that the larvae were stressfully looking for a flee way which led to higher number of tunnels in the integrated method. Mean percentage of dead branches showed significantly different and the lowest percentage of dead branches after treatments was recorded for the integrated method as 8.8%; that showed the subsequent effect of higher larval tunnels which led to higher number of dead branches through summer months. In addition, trees infected by M. picta are highly sensitive to infection by pathogens. Based on the results obtained in this paper, it could be concluded that Dorsban 1% is not an effective method to control M. picta and it is better to find an alternative method.
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