Parasitic Activity Of Powdery Mildew (Pathogen Strain Hmlac226) On Prostrate Knotweed (Polygonum Aviculare L.) At Various Locations Of Shenyang, Northeast China
文献类型： 外文期刊
作者： Feng, Y. L.;Nasir, M.;Lu, X. R.;Liu, M. C.;Iqbal, M. F.;Sikandar, A.;Iqbal, M. F.
作者机构：
关键词： Ecology; Landscape; Native Plant; Transect Method; Liaoning-Province
期刊名称： APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH
ISSN： 1589-1623
年卷期： 2019 年 17 卷 6 期
页码：
摘要： Prostrate knotweed (Polygonum aviculare L.) is a persistent native weed of China. This weed is characterized by high genetic and biological plasticity having a capacity to spread on a landscape scale. The present study planned to investigate the infection of a plant parasitic powdery mildew on P. aviculare on a landscape scale in three different locations of Shenyang during 2018. These locations were selected with a control treatment for proper comparison. Different growth parameters were observed and calculated by coefficient of determination (R-2). Maximum temperature (Maxt) ranged 25-30 degrees C and Minimum temperature (Mint) between 17-20 degrees C with relative humidity 64-78% played a vital role for the emergence and flourishing of pathogen pressure on the plant. The elevated value of R-2 = 0.97 for Mint with RAISE (Root Mean Square Error) < 5 recorded excellent prediction followed by R-2 = 0.82 with RMSE < 5-10 for Maxt recorded very good model prediction. Highly significant (P < 0.001) height of Polygonum aviculare was recorded (23.125 +/- 0.59) in parasite free plants compared to (20.99 +/- 0.96) location-I having Mean SD. Both temperature ranges has a significant effect (P < 0.0001) with (F = 5.917; P < 0.0001; F = 25.721; P < 0.0001) three locations; however, the effect of the locations on plants height (P. aviculare) did not differ statistically (F = 2.102; P > 0.05) between two temperature ranges from 25-30 degrees C and 17-20 degrees C. According to our findings, plant parasitic powdery mildew (pathogen strain HMLAC226) affected significantly with growth characteristics of prostrate knotweed.
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