Effects of Priming in Combination with Fungicides on Germination and Infestation of Lettuce (Lactuca sativa L.)

HU Jin; Tylkowska K

摘要

Two seed lots of lettuce (Lactuca sativa L.) cv. Krolowa Majowych were primed in polyethylene glycol (PEG) 8000 at -1.25MPa for 7 days in dark at 20℃. Two fungicide treatments combined with PEG were used to control fungi: 1) Funaben T (0.1%) and Apron 35 SD (0.02%) were added to -1.25 MPa PEG solution (PEG+F); 2) After seed priming and drying,Funaben T was mixed at 5 g kg-1 and Apron 35 SD at 1 g kg-1 of seeds (PEG then F dust). PEG, PEG+F and PEG then F dust treatments reduced significantly thermodormancy and increased the seed germination at 35℃ in both lots. PEG then F dust treatment had the best effect on reducing seed thermodormancy at 35℃, and increased seed germination to 64.5% in lot 1 and 72.0% in lot 2 compared to 0 in untreated. PEG and PEG then F dust treatments have accelerated germination speed at 20 and 15℃ in both lots. There was a significant reduction in seed infestation in which the seeds were treated with PEG+F and PEG then F dust compared to untreated seeds and PEG primed seeds. PEG priming enhanced seed infestation considerably by Alternaria alternata, Penicillium spp., Rhizopus spp. and Ulocladium spp. Mycological analysis showed higher frequency of Alternaria alternata and Ulocladium spp. in untreated seeds at 20℃. Priming in combination with fungicides significantly alleviated the infestation of fungi, especially Alternaria alternata infestation.

机译：两种子的莴苣（莴苣）。将Krolowa Majowych在-1.25MPa的聚乙二醇（PEG）8000中于20℃的黑暗中灌注7天。两种与PEG结合的杀菌剂处理用于控制真菌：1）将Funaben T（0.1％）和Apron 35 SD（0.02％）添加到-1.25 MPa PEG溶液（PEG + F）中; 2）将种子上底漆和干燥后，将Funaben T以5 g kg-1的种子和1 g kg-1的种子的围裙35 SD混合（PEG然后F粉尘）。在两个批次中，PEG，PEG + F和PEG然后F的粉尘处理均显着降低了热休眠并增加了35℃下的种子萌发。 PEG然后F粉尘处理在降低35℃种子热休眠方面效果最好，与未处理相比，第一批种子发芽率提高到64.5％，第二批种子发芽率提高到72.0％。 PEG和PEG然后F的粉尘处理在两个批次中均加快了20和15℃的发芽速度。与未经处理的种子和PEG引发的种子相比，用PEG + F和PEG然后F灰尘处理种子的种子侵扰显着减少。 PEG引发可显着增强链格孢，青霉菌，根霉菌的种子侵染。和Ulocladium spp。真菌学分析显示，链格孢和链球菌的频率较高。在20℃下未经处理的种子中。与杀真菌剂组合使用引发可显着减轻真菌的侵染，尤其是链格孢菌。

Effects of Priming in Combination with Fungicides on Germination and Infestation of Lettuce (Lactuca sativa L.)

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