Effects of imidacloprid and thiamethoxam as seed treatments on the early seedling characteristics and aphid-resistance of oilseed rape
文献类型： 外文期刊
作者： Huang Liang 1 ; Zhao Chun-lin 2 ; Huang Fang 2 ; Bai Run-e 3 ; Lu Yao-bin 1 ; Yan Feng-ming 3 ; Hao Zhong-ping 4 ;
作者机构： 1.Zhejiang A&F Univ, Sch Agr & Food Sci, Linan 311300, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Plant Protect & Microbiol, Hangzhou 310021, Zhejiang, Peoples R China
3.Henan Agr Univ, Coll Plant Protect, Zhengzhou 450002, Peoples R China
4.Anhui Acad Agr Sci, Crop Res Inst, Key Lab Crop Qual Improvement Anhui Prov, Hefei 230031, Peoples R China
关键词： oilseed rape;seed coating agent;imidacloprid;thiamethoxam;seedling growth;germination;aphid
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2015 年 14 卷 12 期
页码：
收录情况： SCI
摘要： Seed treatments with the neonicotinoid insecticides imidacloprid and thiamethoxam were evaluated to determine whether the chemicals at effective concentrations for aphid control would influence the germination and early growth of oilseed rape, Brassica napus. Treatment with imidacloprid or thiamethoxam did not affect the cumulative germination rate, but significantly inhibited establishment potential by suppressing root system development in the cotyledon stage. However, these alterations in seedling development in the thiamethoxam-treated seeds appeared not to be detrimental as leaves developed; in contrast, for the seedlings with imidacloprid as seed treatment agent, a significantly decreased shoot/root ratio was still evident at the late two-leaf stage. After two leaves developed, chlorophyll content per leaf in the thiannethoxam treatment was significantly higher than that of the control, while chlorophyll content per leaf in the imidacloprid treatment remained close to that in the control. Most other parameters, i.e., height, leaf area, weight of stem, leaf or root, and other growth indexes, between the treatments and the control showed no significant difference. Additionally, it was found that storage time of the treated seeds had a significant effect on cumulative germination rate. Treatment 30 d before planting significantly reduced germination relative to that of the control. All of the plants treated with neonicotinoids were shown to have significant anti-aphid characteristics that persisted until the end of the trial.
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