Toxicity of ionic thiocyanate-amended soil to the wireworm Limonius californicus (Coleoptera: Elateridae).

摘要: Glucosinolates contained in cruciferous plant tissues are hydrolyzed to a variety of biologically active products that potentially useful for control soil-borne pests. Isothiocyanates have been shown be toxic and repellent wire worms, but little is known about the toxicity another important glucosinolate degradation product, ionic thiocyanate (SCN). This study reports on bioassays assessing acute sublethal repellency soil amended with SCN- (supplied as KSCN) sugar beet worm, Limonius californicus (Mannerheim). Wire worms exposed 0, 150, 300 nmol SCN-/g 7 d showed mortality no significant differences among treatment levels. There were treatments surviving maintained untreated germinating wheat seeds an additional 35 d, suggesting effects from initial 7-d exposure. An LC50 12.36 × 104 soil, concentration 600-fold greater than generated defatted Brassica napus L. (Brassicaceae) seed meal, was estimated 24 h. Laboratory also indicated not repelled by SCN -treated soil. Thus, at concentrations tissues, does appear play major role reducing worm populations.