Studies on the Systematic Uptake of Toxic Phosphorus Esters by Plants - Phytotoxic Effects of Soil Applications of the Organophosphorus Insecticides Mevinphos and Methyl Demeton on Selected Plant Species
Abstract
Data relating the tolerance of agronomic plants to soils contaminated with high concentrations of organophosphorus insecticides may emphasize the need for decontaminating soils following accidental spillage. The insecticides 2- carbomethoxyl-1-methylvinyl dimethyl phosphate (mevinphos) and a mixture of the two isomers 0,0-dimethyl S-(2-(ethylthio) ethyl) phosphorothioate and 0,0- dimethyl 0-(2-(ethylthio) ethyl) phosphorothioate (methyl demeton) were soil applied to 15 economically important plants at the rate of 100, 200, 400, and 800 pounds active ingredient per acre. The separate statistical analysis of the several days (1, 3, 7, and 10) on which measurements (damage ratings) were taken indicated that the effects of damage were clearly manifested by the seventh day. By the seventh day the average observed damage caused by mevinphos (all plants averaged) was slight to moderate while damage caused by methyl demeton was moderate to heavy. The 15 plant species could be divided into eight groups on the basis of similar phytotoxic responses to the insecticides. The most susceptible plants to soil drench applications were oats, wheat, collards, tomatoes, and sorghum.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1970
- Accession Number
- AD0881002
Entities
People
- Alvin L. Young
- Billy C. Wolverton