Selectiveness of Cnaphalocrocis medinalis to Host Plants

• Published in: Rice science Vol. 19; no. 1; pp. 49 - 54
• Main Authors: LIU, Fang, CHENG, Jian-jun, JIANG, Tao, SU, Wen, XU, Shuai
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2012; College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
• Subjects: Cnaphalocrocis medinalis; host plant; host selection; rice variety; weed species; 实验室实验; 寄主植物; 扬稻6号; 挥发性化合物; 水稻品种; 汕优136; 田间试验; 稻纵卷叶螟; host selection; rice variety; weed species; Cnaphalocrocis medinalis; host plant
• ISSN: 1672-6308; 1876-4762
• DOI: 10.1016/S1672-6308(12)60020-1

A field experiment was conducted to study the selectiveness of Cnaphalocrocis medinalis Guenee （commonly known as the rice leaffolder or rice leafroller） towards five rice varieties （Yangfujing 8, Yangdao 6, Shanyou 136, Huaidao 9 and Nin.gjing 1） and three weed species （Echinochloa crusgalli, Leptochloa chinensis and Leersia hexandra）. The results showed that the rice varieties carried significantly higher numbers of C. medinalis moths and eggs than the weed species. Among the rice varieties, Yangfujing 8 was associated with a higher moth number. However, there was little difference in the number of C. medinalis eggs among the rice varieties. Additionally, a laboratory experiment was performed to investigate the olfactory response of female C. medinalis towards volatile compounds from different rice varieties, as well as its oviposition preference towards these rice varieties. The volatiles of Yangfujing 8, Yangdao 6 and Shanyou 136 attracted C. medinalis similarly to those of TN 1. In contrast, the volatiles of Huaidao 9 and Ningjing 1 clearly deterred C. medinalis. Nevertheless, C. medinalis did not exhibit clear oviposition preference towards any of the five tested rice varieties.