Field trials of Metarhizium anisopliae var. acridum (Ascomycota: Hypocreales) against oriental migratory locusts, Locusta migratoria manilensis (Meyen) in Northern China

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• 作者：Guoxiong Peng ; Zhongkang Wang ; Youping Yin ; Dengyu Zeng ; Yuxian Xia
• 关键词：Locusta migratoria manilensis ; Metarhizium anisopliae ; Oil miscible suspension formulation ; Aerial spray ; Ground spray
• 刊名：Crop Protection
• 出版年：2008
• 期刊代码：28_02612194
• 类别：abs
• 出版时间：September 2008
• 卷：27
• 期：9
• 页码：1244-1250
• 文件大小：182 K

摘要

During 2002–2006, nymph bands of Locusta migratoria manilensis (Meyen) were treated by ground and aerial applications in 6000 ha of grasslands and the nearby beach of Yellow river using a soybean oil miscible suspension ULV formulation of Metarhizium anisopliae var. acridum isolate CQMa102. The formulation was also applied in Tianjin, Henan, Hebei, Shandong and Shanxi provinces of Northern China by ground and aerial applications. During field studies, cage tests were carried out in corresponding field plots in order to estimate the mortality accurately. Doses of 3.3×10¹² and 5.0×10¹² conidia ha⁻¹ were equally effective and caused 90%mortality 9–13 days after treatment. In the ground spray trial, 3.3×10¹² conidia ha⁻¹ killed >90%of L. migratoria manilensis 11–15 days after treatment in a wide variety of vegetation and weather conditions. The decline of locust populations was slower where vegetation was taller and denser. In the aerial spray treatment, the final percent survival of locusts was lowered to 10%at 11 and 14 days in the field cage and open field locusts, respectively. Furthermore, the M. anisopliae oil miscible suspension formulation did not appear to harm natural enemies of locusts in the field.