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番茄营养丰富,风味佳良,既可生啖,又宜熟食,鲜销制罐,兼而用之,是我国南北普遍栽培的一种高产蔬菜作物。不良的环境条件,如夜温低于13℃或高于25℃,常导致番茄花器发育不全,以及损害受精过程而引起番茄落花。花开花落与其他生理过程一样,无不受到植物激素的调节控制。早在40年代,人们就已应用2,4-D及2,4,5-T防止番茄落花。这对番茄的早熟丰产起了很大作用。江南一带,应用2,4-D已成为生产上一项技术措施,可是由于2,4-D的有效浓度与有害浓度非常接近,易产生药害。为避免发生药害,生产上一般采用局部浸花或涂花的方法。上海郊区,春番茄栽培面积
Tomato nutrient-rich, good flavor, both raw and cooked, and should be cooked, fresh-selling cans, both used, is widely cultivated in North and South China a high-yielding vegetable crops. Poor environmental conditions, such as night temperatures below 13 ° C or above 25 ° C, often cause hypoplasia in tomato florets and cause damage to the tomato during flowering. Flower flowering and other physiological processes are the same, all controlled by plant hormones. As early as the 1940s, 2,4-D and 2,4,5-T have been used to prevent tomato from falling off. This is a great contribution to the early yield of tomato. Jiangnan area, the application of 2,4-D has become a production of a technical measure, but the effective concentration of 2,4-D and harmful concentrations are very close, easy to produce phytotoxicity. In order to avoid phytotoxicity, the production generally adopts the method of partial immersion or flower coating. Shanghai suburbs, spring tomato cultivation area