Development of cotton in response to mode of application and doses of mepiquat chloride in seeds

作者：Nagashima Getulio Takashi^*; Miglioranza Edison; Marur Celso Jamil; Yamaoka Ruy Seiji; dos Reis Silva Joao Guilherme

来源：Ciencia Rural, 2010, 40(1): 7-11.

DOI：10.1590/S0103-84782009005000236

• plant growth regulator
• treatment methods
• seeds treatment
• Gossypium hirsutum r. latifolium

The application of growth regulator through seed imbibitions has some drawbacks, including the requirement of drying the seeds after treatment. The objective of this research was to evaluate the effect of seeds treatment with Mepiquat Chloride (MC) on cotton plant growth by direct application and soaking. The treatments were arranged in randomized blocks with six replicates, using PR 02-307 lineage. The experiment consisted of five treatments: untreated seeds; direct application of MC on the seeds with 3.75 and 7.5g a.i. kg(-1) of seed and soaking in solutions of 3.75 and 7.5g a.i. kg(-1) of seeds. After the treatments, the seeds were sowed in three liters vases in a greenhouse. Height and leaf area were evaluated until 90 days after emergency and dry matter weight was evaluated at end of the experiment. The treatments that used growth regulator on seeds led to plant height reduction from emergency, regardless of dose and form of application. MC can be used by seed soaking or direct application on the seeds, as both have similar effects on height reduction, leaf area, dry matter of leaves and stems of cotton plants. The effect is dose-proportional.

• 出版日期2010-2