Effects of Selected Nematicides on Hatching of Heterodera schachtii
Abstract
Aldicarb, carbofuran, fensulfothion, and phenamiphos were tested in concentrations of 1-100 [mu]g/ml for their effects on hatching of Heterodera schachtii. Exposure of cysts to 1 [mu]g aldicarb or carbofuran/ml stimulated hatch whereas phenamiphos and, to a lesser degree, fensulfothion inhibited hatch. Addition of aldicarb to sugarbeet root diffusate or 4 mM zinc chloride suppressed activities of these hatching agents. Transfer of cysts previously treated with aldicarb or carbofuran to zinc chloride or water rapidly initiated hatch which finally exceeded the hatch from cysts not treated with the nematicides. Key words: sugarbeet diffusate, zinc chloride, aldicarb, carbofuran, fensulfothion, phenamiphos, hatch, Beta vulgaris, sugarbeet nematode.Downloads
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