Effects of imidacloprid and thiamethoxam as seed treatments on the early seedling characteristics and aphid-resistance of oilseed rape

HUANG Liang; ZHAO Chun-lin; HUANG Fang; BAI Run-e; L Yao-bin; YAN Feng-ming; HAO Zhong-ping

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Effects of imidacloprid and thiamethoxam as seed treatments on the early seedling characteristics and aphid-resistance of oilseed rape

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Seed treatments with the neonicotinoid insecticides imidacloprid and thiamethoxam were evaluated to determine whether the chemicals at effective concentrations for aphid control would inlfuence the germination and early growth of oilseed rape,Brassica napus. Treatment with imidacloprid or thiamethoxam did not affect the cumulative germination rate, but signiifcantly 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 signiifcantly decreased shoot/root ratio was stil evident at the late two-leaf stage. After two leaves developed, chlorophyl content per leaf in the thiamethoxam treatment was signiifcantly higher than that of the control, while chlorophyl 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 signiifcant difference. Additionaly, it was found that storage time of the treated seeds had a signiifcant effect on cumulative germination rate. Treatment 30 d before planting signiifcantly reduced germination relative to that of the control. Al of the plants treated with neonicotinoids were shown to have signiifcant anti-aphid characteristics that persisted until the end of the trial.

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《农业科学学报（英文版）》 |2015年第12期|2581-2589|共9页
作者
HUANG Liang; ZHAO Chun-lin; HUANG Fang; BAI Run-e; L Yao-bin; YAN Feng-ming; HAO Zhong-ping;
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School of Agricultural and Food Science, Zhejiang A & F University, Lin’an 311300, P.R.China;

Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P.R.China;

Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P.R.China;

Colege of Plant Protection, Henan Agricultural University, Zhengzhou 450002, P.R.China;

School of Agricultural and Food Science, Zhejiang A & F University, Lin’an 311300, P.R.China;

Colege of Plant Protection, Henan Agricultural University, Zhengzhou 450002, P.R.China;

Key Laboratory of Crop Quality Improvement of Anhui Province/Crop Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031, P.R.China;

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Effects of imidacloprid and thiamethoxam as seed treatments on the early seedling characteristics and aphid-resistance of oilseed rape

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