Sandhu Hardev S, Nuessly Gregg S, Webb Susan E, Cherry Ronald H, Gilbert Robert A
Everglades Research and Education Center, University of Florida, Institute of Food and Agricultural Services, Belle Glade, FL 33430, USA.
Environ Entomol. 2010 Jun;39(3):1012-20. doi: 10.1603/EN09284.
Lesser cornstalk borer, Elasmopalpus lignosellus Zeller (Lepidoptera: Pyralidae), is an important sugarcane pest in southern Florida. Development of immature stages (eggs, larvae, prepupae, and pupae) of lesser cornstalk borer was observed on sugarcane at constant temperatures (13, 15, 18, 21, 24, 27, 30, 33, and 36 degrees C), 65-70% RH, and a photoperiod of 14:10 (L:D) h. Total development (from egg deposition to adult emergence) ranged from 22.8 +/- 0.3 d at 33 degrees C to 120.7 +/- 2.8 d at 13 degrees C. Lesser cornstalk borer required 543.48 DD to complete development. Developmental time decreased with increase in temperature from 13 to 33 degrees C and increased markedly at 36 degrees C in all immature stages. One linear and six nonlinear models used to model insect development (Briere-1, Briere-2, Logan-6, Lactin, Taylor, and polynomial models) were tested to describe the relationship between temperature and developmental rate (d(-1)). Criteria used to select the best model were the greatest r (2), lowest residual sum of squares (RSS), and Akaike information criterion values. The Briere-1 model fit the data best and provided the best estimates of developmental temperature thresholds for all immature stages on sugarcane. The estimated lower and upper developmental thresholds for total development were 9.3 +/- 1.8 and 37.9 +/- 0.7 degrees C, respectively. The optimal temperature estimated for the total development was 31.39 +/- 0.9 degrees C. Based on these results, we can forecast the different stages of lesser cornstalk borer at different times in sugarcane. This will enable us to choose the best time to control this pest with greater precision.
小蔗螟，Elasmopalpus lignosellus Zeller（鳞翅目：螟蛾科），是佛罗里达州南部一种重要的甘蔗害虫。在恒温（13、15、18、21、24、27、30、33和36摄氏度）、相对湿度65 - 70%以及光周期为14:10（光照:黑暗）小时的条件下，观察了小蔗螟未成熟阶段（卵、幼虫、预蛹和蛹）在甘蔗上的发育情况。整个发育过程（从产卵到成虫羽化）在33摄氏度时为22.8±0.3天，在13摄氏度时为120.7±2.8天。小蔗螟完成发育需要543.48日度。在所有未成熟阶段，发育时间随温度从13摄氏度升高到33摄氏度而减少，在36摄氏度时显著增加。测试了用于模拟昆虫发育的一个线性模型和六个非线性模型（Briere - 1、Briere - 2、Logan - 6、Lactin、Taylor和多项式模型），以描述温度与发育速率（天-1）之间的关系。用于选择最佳模型的标准是最大的r（2）、最低的残差平方和（RSS）以及赤池信息准则值。Briere - 1模型对数据拟合最佳，并为甘蔗上所有未成熟阶段的发育温度阈值提供了最佳估计。整个发育过程的估计下限和上限发育阈值分别为9.3±1.8摄氏度和37.9±0.7摄氏度。整个发育过程的最佳估计温度为31.39±0.9摄氏度。基于这些结果，我们可以预测甘蔗在不同时间小蔗螟的不同阶段。这将使我们能够更精确地选择控制这种害虫的最佳时间。
