Evaluation of Biological Activity of Plant Oils and Soaps, towards to Sphaerotheca Fuliginea

摘要

In spring and summer of 2003, in Agricultural University in town of Plovdiv, were conducted a trials to control Sphaerotheca fuliginea on cucumber plants growing under greenhouse conditions, with plant oils and soaps. We tested a refined grape - seedoil, emulgated with soybean lethicin, oil and it's soap derived from plants witch are from Brassicaceae family, and treatment with soy-bean lethicin on one's own. A mineral oil applied in Bulgaria as pesticide under target name RZ Maslo was used as standard, and water treatment - as control. The results shown a high curative action of water emulsion of grape-seed oil. The oil and soap from plant from Brassicaceae family had a more strong preventive action, the soybean lethicin - alone treatment - the same action. A tests with grape-seed oil water emulsion was conducted to determine inhibition of fertility of cucumber pollen - they showed decreased germination of pollen die of treatment with grape-seed oil water emulsion, corresponding with doses of application - lower doses - lower inhibition. Another tests with the same oil and with oils and soaps derived from plants from Brassicaceae family were conducted to determine theirs phytotoxic behavior according to cucumber plants.