Herbicidal Activity of d-Limonene to Burcucumber (Sciyos angulatus L.) with Potential as Natural Herbicide

Abstract

The potential as natural herbicide of d-limonene natural agent was conducted on several weeds in a greenhouse and Sciyos angulatus in field condition. Herbicidal activity of foliar application at a concentration of 100 and 200 kg ai ha-1 of d-limonene on seven weed species was completely killed in a greenhouse condition. Also, d-limonene at a concentration of 50 kg ai ha-1 was completely killing on Abutilon theophrasti, Aeschynomene indica, Echinochloa crus-galli and Digitaria ciliaris 3 days after treatment. While pre-emergence treatment of d-limonene concentration of 12.5 to 200 kg ai ha-1 showed not significant visible damages. Phytotoxic symptoms of d-limonene by foliar treatment were characterized by wilting and burn-down of leaves and stems followed by discoloration, finally, plant death. Crop selectivity at d-limonene concentration of 100 kg ai ha-1 over to five main crops including Zea mays by foliar application was not at all. Field trial of foliar treatment with d-limonene 70 to 140 kg ai ha-1 have effectively controled over 5～20 leaf stages of S. angulatus at the natural habitats. And herbicidal efficacy of foliar application on S. angulatus with carrier volume in field condition was increased with dose dependent manners. These results suggest that d-limonene is considered possible as herbicide, and may be further optimized for natural agent for environmental friendly natural herbicide. 서 언 유기합성 제초제는 생산비용이 낮고 강력한 살초력 을 발휘하기 때문에 전 세계적으로 농작물 생산성 향 상을 위해 유용하게 사용되어 왔다. 그러나 triketone계 제초제 개발 이후 새로운 작용점을 갖는 다른 제초제