Effect of Some Formulated Insecticides on Pollen Germination in Tomato and Petunia1

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Abstract
The germination of petunia and tomato pollen on artificial media was completely inhibited by topical applications of naled 58% EC formulated at 1000 ppm actual material. Reduction in the germination and tube elongation of pollen was caused by 1000 ppm of EC formulations of parathion 80%, azinphosmethyl 50%, dicofol 18.5%, endosulfan 24%, dichlorvos 41.4% and wp formulations of DDT 50%, azinphosmethyl 22%, and Gardona® 75%, (2-chloro-I-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate). The carbamate pesticides carbaryl 80% WP, and methomyl 30% EC and 90% sp had little or no deleterious effect upon pollen. Xylene at 1000 ppm was also noninjurious to pollen.

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