Antwi Frank B, Reddy Gadi V P
Western Triangle Agricultural Research Center, Montana State University, 9546 Old Shelby Rd., P.O. Box 656, Conrad, MT 59425 (
J Econ Entomol. 2016 Aug;109(4):1706-12. doi: 10.1093/jee/tow140. Epub 2016 Jun 21.
The crucifer flea beetle, Phyllotreta cruciferae (Goeze), is a key pest of canola (Brassica napus L.) in the northern Great Plains of North America. The efficacies of entomopathogenic nematodes (Steinernema spp. and Heterorhabditis spp.), a sprayable polymer gel, and a combination of both were assessed on canola for flea beetle management. Plots were treated soon after colonization by adult flea beetles, when canola was in the cotyledon to one-leaf stage. Ten plants along a 3.6-m section of row were selected and rated at pre-treatment and 7 and 14 d post treatment using the damage-rating scheme advanced by the European Plant Protection Organization, where 1 = 0%, 2 = 2%, 3 = 5%, 4 = 10%, and 5 = 25% leaf area injury. Under moderate flea beetle feeding pressure (1-3.3% leaf area damaged), seeds treated with Gaucho 600 (Bayer CropScience LP Raleigh, NC) (imidacloprid) produced the highest yield (843.2 kg/ha). Meanwhile, Barricade (Barricade International, Inc. Hobe Sound, FL) (polymer gel; 1%) + Scanmask (BioLogic Company Inc, Willow Hill, PA) (Steinernema feltiae) resulted in the highest yields: 1020.8 kg/ha under high (2.0-5.3% leaf area damaged), and 670.2 kg/ha at extremely high (4.3-8.6 % leaf area damaged) feeding pressure. Our results suggest that Barricade (1%) + Scanmask (S. feltiae) can serve as an alternative to the conventional chemical seed treatment. Moreover, Scanmask (S. feltiae) can be used to complement the effects of seed treatment after its protection has run out.
十字花科跳甲，即PhPhPh Phyllotreta cruciferae (Goeze)，是北美大平原北部油菜（Brassica napus L.）的一种主要害虫。对用于油菜跳甲防治的昆虫病原线虫（斯氏线虫属和异小杆线虫属）、一种可喷雾的聚合物凝胶以及二者的组合进行了功效评估。在成虫跳甲定殖后不久，即油菜处于子叶至一叶期时对试验区进行处理。沿 3.6 米长的行选取 10 株植株，并在处理前以及处理后 7 天和 14 天，使用欧洲植物保护组织提出的损害评级方案进行评级，其中 1 = 0%，2 = 2%，3 = 5%，4 = 10%，5 = 25%叶面积损伤。在中等跳甲取食压力（叶面积损伤 1 - 3.3%）下，用高巧 600（拜耳作物科学有限责任公司，北卡罗来纳州罗利）（吡虫啉）处理的种子产量最高（843.2 千克/公顷）。同时，围挡（围挡国际公司，佛罗里达州霍贝桑德）（聚合物凝胶；1%） + 斯氏线虫（生物逻辑公司，宾夕法尼亚州柳树山）（斯氏线虫）产量最高：在高取食压力（叶面积损伤 2.0 - 5.3%）下为 1020.8 千克/公顷，在极高取食压力（叶面积损伤 4.3 - 8.6%）下为 670.2 千克/公顷。我们的结果表明，围挡（1%） + 斯氏线虫（斯氏线虫）可作为传统化学种子处理的替代方法。此外，在种子处理的保护期过后，斯氏线虫（斯氏线虫）可用于补充种子处理的效果。
