The effects of paclobutrazol and cupper sulphate on seedling and plant growth in double crop growing in greenhouse cucumber production

One of the biggest problems encountered in the production of cucumber seedlings is extreme increase in seedling height after germination. In this study, leaf applications of paclobutrazol and copper sulfate were done in two different growing seasons (spring and autumn) in two different doses at three different times to control excessive increase in plant height. For this purpose, 400, 400+400, 400+400+400, 800, 800+800, 800+800+800 of paclobutrazol and 4000, 4000+4000, 4000+4000+4000, 8000, 8000+8000, 8000+8000+8000 ppm copper sulfate were applied to the leaves.In spring applications, all doses of paclobutrazol were effective in controlling seedling height while the copper sulfate did not influence the seedling height. In autumn applications, any effect was observed in applications except 800+800+800 ppm of paclobutrazol. The shortest seedlings were obtained from 800+800+800 ppm doses of paclobutrazol with 2.64 cm. According to the results in spring cucumber seedling growing, all doses of paclobutrazol were effective in controling height while in autumn applications, could not show sufficient effect because of high temperatures. According to the results of the study in order to control cucumber seedling height it was determined that paclobutrazol can be used effectively, copper sulfate did not possess the desired effect.