Everglades Research & Education Center, Institute of Food and Agricultural Sciences, University of Florida, 3200 E. Palm Beach Rd., Belle Glade, FL 33430, USA.
J Econ Entomol. 2011 Feb;104(1):155-63. doi: 10.1603/ec10212.
Lesser cornstalk borer, Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae) is an important pest of sugarcane (a complex hybrid of Saccharum spp.) in southern Florida. Cultural controls for E. lignosellus were evaluated in preparation for the potential loss of effective insecticides. Field studies conducted in 2006 compared the effects of harvest residues from green-harvested sugarcane (no preharvest burning to remove leaf matter) on E. lignosellus stalk damage and yield. Damage by E. lignosellus was significantly lower in plant cane plots that were covered with harvest residues collected from a green-harvested field before shoot emergence compared with plots without harvest residue. There were no yield differences between plots with and without harvest residues in plant or ratoon sugarcane fields in the 2006 study. The effects of three postharvest tillage levels (conventional, intermediate, and no tillage) were evaluated in preharvest burned and green-harvested fields in 2008 and 2009. Significantly less E. lignosellus damage was observed in the green- versus preharvest burned fields in both years. Intermediate and no-tillage plots had very little damage in green-harvested field. Conventional tillage plots had the greatest damage in the green-harvested field and the lowest damage in the preharvest burned field. In 2008, biomass yield was greater in the intermediate than conventional tillage in the green-harvested field, but it was greater in the conventional than in other tillage levels in the preharvest burned field. These studies demonstrated that cultural controls could greatly reduce E. lignosellus damage in sugarcane without the use of insecticides.
小眼锯谷盗，Elasmopalpus lignosellus（泽勒）（鳞翅目：Pyralidae）是佛罗里达州南部甘蔗（甘蔗属的复杂杂种）的重要害虫。在可能失去有效杀虫剂的情况下，评估了小眼锯谷盗的文化控制措施。2006 年进行的田间研究比较了绿收甘蔗（不进行收获前燃烧以去除叶物质）收获残余物对小眼锯谷盗茎损伤和产量的影响。与没有收获残余物的小区相比，在新芽出现之前，从小青叶收获的田间收集的收获残余物覆盖的原种甘蔗小区中，小眼锯谷盗的损伤明显较低。在 2006 年的研究中，原种和再生甘蔗田有和没有收获残余物的小区之间没有产量差异。2008 年和 2009 年，评估了三种收获后耕作水平（常规、中等和免耕）在收获前燃烧和绿收田中的影响。在这两年中，绿收田中的小眼锯谷盗损伤明显低于收获前燃烧田。中等和免耕小区在绿收田中的损伤很小。在绿收田中，常规耕作小区的损伤最大，在收获前燃烧田中的损伤最小。2008 年，在绿收田中间作的生物量产量大于常规耕作，但在收获前燃烧田，常规耕作的产量大于其他耕作水平。这些研究表明，在不使用杀虫剂的情况下，文化控制措施可以大大减少甘蔗中小眼锯谷盗的损伤。
