الفهرس | Only 14 pages are availabe for public view |
Abstract Experiments were conducted to study the side effects insecticide residues on germination, plant growth, flownodulation of both broad bean and cowpea. Clay soil was used in all experiments. Insecticides ested were decamethrin, cypermethrin, fenvalerate, triazophos, imethoate, profenfos, mephosfolan, disulfoton, lindane, endrin, DT and methomy1. These insecticides were used at several concentrations 5, 10, 15, 20, 40, 50, 60, 80 & 100 ppm ), as active ngredients. Results indicated that these residues affected the rminat10n of both broad bean and cowpea plants at concen rations more thaD 30 ppm at all cases. Some of the inseotici es tested decreased the percentage of germination also The soil was irrigated by water to 75 % of its field apacity. The percentage of germination was recorded after o days. The side effecttof these residues on plant growth s recorded. The number of flowers and number of nodules in treated d untreated pots were also estimated. a low concentrations. All insecticides tested decreased the length of root a concentrations aore t•han 20 ppm. Some of them.reduced the ength of stem and some had nearly no effecti specially t low concentrations. The phytotoxic symptoms Which appeared in most cases ere dwarfing, swollen roots, tWisted leaves, discoloration nd the burnet edges of the leaflets • .Most of the insecticides decreased the number of odules specially at concentration more than 10 ppm. The tested insecticides decreased also the number of lowers per plant at all concentrations. Lindane and endrin were detected in broad bean plants. esidues from both the insectioides tested were found in all arts of the plant. They were concentrated in roots more han in the other parts. Lindane was distributed in all arts of the plant but it _e concentrated at upper”leafets, while eDdrin was conoentrated in the lower leaflets. |