Phytotoxic effect of oxadiargyl on germination and early growth of sunflower (Helianthus annuus L.) and maize (Zea mays L.)

• Published in: Archiv für Phytopathologie und Pflanzenschutz 2011-12, Vol.44 (19), p.1901-1907
• Main Authors: Nethra, N.S, Jagannath, Shobha
• Format: Article
• Language: English
• Subjects: corn; crops; Flowers & plants; germination; Helianthus; Helianthus annuus; hydroponics; maize; oxadiargyl; phototoxicity; Phytotoxicity; plumule; seed germination; seedlings; sunflower; vigor; Zea mays
• ISSN: 1477-2906; 0323-5408; 1477-2906
• DOI: 10.1080/03235408.2010.507946

An attempt was made to assess the phytotoxicity of oxadiargyl on two crop plants, viz. sunflower and maize. The seed germination and early growth studies were carried out in hydroponic conditions with each variety of two crop plants, viz. sunflower (Morden) and maize (NAC-6004) supplemented with five concentrations of oxadiargyl. Seed germination and early growth of both the crop plants were significantly affected with increased concentration of oxadiargyl. The length of radicle and plumule was severely reduced along with increase in herbicidal concentration. Similarly, the calculated value of tolerance index and vigour index decreased drastically with increase in concentration of oxadiargyl. On the contrary, the per cent phytotoxicity also increased with increase in oxadiargyl concentration. Further, the pigment system of both the crop seedlings was severely affected by the herbicide oxadiargyl. These studies clearly indicate that oxadiargyl is phototoxic in nature.