This study was aimed at evaluating allelopathic activity of various solvent extracts of Pinus roxburghii (Pine tree) against some important weeds viz. Phalaris minor (bunchgrass), Avena fatua (wild oat), Chenopodium album (pigweed), Euphorbia helioscopia (sun spurge) and Rumex dentatus (toothed dock) of bread wheat (Triticum aestivum) by employing sandwich method (powdered needles) on filter paper, soil and agar. The data attained from statistical analysis revealed that methanolic needle extract possessed the highest germination percentage inhibition for T. aestivum, followed by C. album and A. fatua applied in soil. Similarly, maximum radical length suppression was observed for R. dentatus, followed by C. album. The plumule length retardation was noted best in R. dentatus, followed by A. fatua. The application of methanolic P. roxburghii extract was responsible for reduction in seed germination, radical and plumule length of wheat. Based on results, it can be concluded that methanolic Pinus needles extract possesses potential inhibitory effects that required for further detailed analysis to establish allelopathic potential and onward application to be used as phytoherbicide.

The morphology and morphometric traits of native populations of these nematodes were found correspond to the type specimens. According to the latest information, these identified nematodes species are new records from Pakistan.

No abstract