Ramachandran, N.Sarma, Y.R.2014-08-142014-08-141985-06J.Plantn.Crops 1985 v-13 i-1 p-38-40http://hdl.handle.net/123456789/4819A study was conducted to know the exposure time required for the uptake of metalaxyl and duration of its persistence in black pepper (Piper nigrum L.) plants, using a leaf lesion bioassay. Metalaxyl at 1000 ppm applied as soil drench was translocated acropetally in significant quantity even one hour after application. The infection on the leaves of metalaxyl treated plants was negligible on the 50th day after which the activity of the fungicide gradually reduced. Thus metalaxyl has an advantage over contact fungicides in controlling infections of Phytophthora palmivora especially under heavy rainfall conditions.enArticle