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摘要………………………………………………………………………………………2 paper51.com 关键词……………………………………………………………………………………2 http://www.paper51.com 前言………………………………………………………………………………………2 http://www.paper51.com
1调查实施………………………………………………………………………………2 copyright paper51.com
1.1调查地点和时间…………………………………………………………………2 内容来自论文无忧网 www.paper51.com
1.2调查内容…………………………………………………………………………2 http://www.paper51.com 1.3调查用具…………………………………………………………………………2 copyright paper51.com 1.4 调查方法…………………………………………………………………………3 http://www.paper51.com 2 调查结果………………………………………………………………………………3 内容来自www.paper51.com
2.1宁蒗烟草病害调查结果…………………………………………………………3 copyright paper51.com 2.1.1三地抽样情况…………………………………………………………………3 http://www.paper51.com 2.1.2三地各种病害综合分析………………………………………………………3 内容来自www.paper51.com 2.1.3各种病害发病情况……………………………………………………………5 copyright paper51.com
2.1.4宁蒗县烟草病害防治对策分析………………………………………………5 http://www.paper51.com
2.2宁蒗县烟草主要虫害及防治对策…………………………………………………6 copyright paper51.com 2.2.1主要害虫调查……………………………………………………………………6 http://www.paper51.com 2.2.2宁蒗县主要害虫情况……………………………………………………………7 copyright paper51.com
2.2.3 防治对策………………………………………………………………………7 paper51.com 3 总结………………………………………………………………………………………8 paper51.com 致谢…………………………………………………………………………………………8 内容来自论文无忧网 www.paper51.com 参考文献……………………………………………………………………………………9 copyright paper51.com |