* Department of Chemistry and Biochemistry, Haryana Agricultural University, Hissar-125 004.
In vitro tests on toxic effect of water andmethanolic extracts of leaves, stems and buds of Datura stramonium, Ipomea carnea, Tagetes patula and Lawsonia alba on the second stage larvae of Tylenchulus semipenetrans and Anguina tritici indicated that methanolic extracts of leaves, stems and buds caused 75–100 per cent larval mortality of T. semipenetrans and A. tritici at 4 mg/ml or 1: 5 dilution. Larval motality in oil extracted from seeds of D. stramonium and L. alba was 65–90 per cent.
Plant extracts, Tylenchulus semipenetrans, Anguina trifici