| 龙吉稻田稻蛀螟发生为害及螟害株密度零频率估计法 |
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| 引用本文： | 李意成,王仁俊,蔡笃程.龙吉稻田稻蛀螟发生为害及螟害株密度零频率估计法[J].热带作物学报,2016,37(3):591-596. |
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| 作者姓名： | 李意成 王仁俊 蔡笃程 |
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| 作者单位： | 海南大学环境与植物保护学院,海南海口,570228 |
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| 基金项目： | 海南省国际科技合作专项（No. KJHZ2013-03）。 |
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| 摘 要： | 稻蛀螟类是水稻常见害虫,为查明稻蛀螟发生为害情况和探索在一定精度保证前提下简便、快捷地估计螟害株密度的方法,对海南省澄迈县老城镇龙吉村稻田稻蛀螟发生为害进行了系统调查,并利用稻丛螟害株密度m和稻丛螟害零频率P0分别拟合线性函数、二次函数、双曲线函数、指数函数、幂函数、对数函数等常用函数模型及Gerrard-Chiang模型和Wilson模型。结果表明,龙吉稻田发生的稻蛀螟种类为三化螟Scripophaga incertulas(Walker)]和大螟Sesamia inferens(Walker)],其中早稻以大螟为主,晚稻则以三化螟占优;早、晚稻的螟害株密度从分蘖后期至乳熟期均呈先上升而后下降趋势,晚稻分蘖后期的螟害株密度明显高于早稻同生育期的,而早、晚稻的螟害株密度在孕穗期、抽穗期和乳熟期等同生育期间的差异不显著;用螟害零频率估计早、晚稻和早-晚稻螟害株密度的最优模型分别为Gerrard-Chiang模型m=1.164 9(-ln P0)1.045 4、双曲线函数模型m=-0.943 5+0.951 3/P0和m=-0.952 5+0.958 3/P0。应用这些模型在相应稻季可根据三化螟和大螟为害的零频率便捷、有效地估计螟害株密度。
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| 关 键 词： | 龙吉 稻蛀螟 零频率 螟害株密度 |
Estimation of Damaged Tiller Density by Zero Frequency as well as Occurrence and Damage of Rice Stem
Borers in the Rice Fields at Longji |
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| LI Yicheng,WANG Renjun and CAI Ducheng.Estimation of Damaged Tiller Density by Zero Frequency as well as Occurrence and Damage of Rice Stem
Borers in the Rice Fields at Longji[J].Chinese Journal of Tropical Crops,2016,37(3):591-596. |
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| Authors: | LI Yicheng WANG Renjun and CAI Ducheng |
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| Institution: | College of Environment and Plant Protection, Hainan University;College of Environment and Plant Protection, Hainan University;College of Environment and Plant Protection, Hainan University |
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| Abstract: | Rice stem borers are common pests to rice. To clarify the occurrence and damage of rice stem borers and to explore a procedure to estimate the damaged tiller density easily and rapidly below the level of accuracy required, a periodic survey was conducted in the rice fields at Longji, a village at Laocheng Town, Chengmai County, Hainan Province, and linear, quadratic, inverse, exponential, power, logarithm models, together with Gerrard-Chiang model and Wilson model were fitted to the damaged tiller densities per hill and the zero frequencies of damaged hills. Two species of rice stem borers, Scirpophaga incertulas(Walker)and Sesamia inferens(Walker)were found, and S. inferens was dominant in the early rice fields while S. incertulas dominant in the late rice fields. From the late tillering stage to the milking stage, the damaged tiller density of the early and the late rice first increased and then decreased. The damaged tiller density of the late rice was higher than that of the early rice at the late tillering stage, but they were not different significantly at booting, heading and milking stages between the early and the late rice. Gerrard-Chiang model, m=1.1649(-lnP0)1.045 4, inverse models, m =-0.943 5+0.951 3/P0 and m=-0.952 5+0.958 3/P0 appeared to be optimum models for estimating the damaged tiller density by the zero frequency of damaged hills for the early rice, the late rice and the early-late rice, respectively. These models could be used to effectively estimate the damaged tiller density based on the zero frequency of damaged hills caused by S. incertulas and S. inferens in the appropriate rice season. |
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| Keywords: | Longji Rice stem borer Zero frequency Damaged tiller density |
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