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番茄在低温寡照等恶劣环境条件下栽培,常因子房和花粉发育不良及授粉受精不正常而产生落花落果,从而严重影响番茄产量。因此,在番茄冬春提早和秋延晚栽培中多采用植物生长调节物质沾花来保花果,促进果实发育。从50年代起,在番茄生产中常采用2,4-D(2,4-二氯苯氧乙酸)防止落花。但是,由于沾花容易产生药害和畸形果,而且果实发育不均衡,后期产量低;采用涂抹法蘸花也比较
Tomato under low temperature and other harsh environments under cultivation conditions, often due to abnormal ovary and pollen dysplasia and pollination and fertilization are not normal and produce rapeseed, which seriously affected the yield of tomato. Therefore, early winter and early spring and late autumn tortoise in the plant growth regulator to spend more flowers to protect flower, promote fruit development. Since the 1950s, 2,4-D (2,4-dichlorophenoxyacetic acid) has been commonly used in tomato production to prevent flower drop. However, because the flowers are easy to produce phytotoxicity and deformities, and the fruit is not balanced development, the late yield is low;