Pesticides in vitro interference in the germination and in the tube pollinic germination and elongation in the tomato plant Cultivar Santa Cruz kada

Abstract

The germination of pollen and tube elongation of tomato (Lycopersicon esculentum Mill.), on artificial medium were drastically reduced by dry residues of chlorothalonil 75% WP (3.200 ppm of a.i.), mancozeb 80% WP (2.400 ppm of a.i.), mancozeb 48% WP (1.680 ppm of a.i.) + metalaxyl 10% WP (350 ppm of a.i.), and dibrom 86% EC (1.030 ppm of a.i.). Cartap 50% SP (600 ppm of a.i.) had no effect upon pollen germination but reduced tube elongation by 38.2% in relation to control. the spreaders stickers, alkyl phenol ethoxylate 25% AS (70 ppm of a.i.) and naphthenic hydrocarbons + ethoxylate compounds 86% - (1.720 ppm of a.i.), and the insecticides abamectin 1.8% EC (300 ppm of a.i.), deltamethrin 2.5% EC (10 ppm of a.i.), methamidophos 60% LC (600 ppm of a.i.), and permethrin 50% EC (100 ppm of a.i.) were noninjurious to pollen.