何时给蔬菜打药最适宜呢?根据我们的几年试验摸索,认为午后4点到傍晚这段时间最佳。其原因是: 蔬菜经过一夜的低温,繁茂的枝叶所含水分得不到蒸发,即使到8点以后上部叶片水分有所蒸发,中下部叶片仍有水珠。如果这时喷药(粉剂除外),势必降低药液浓度,甚至还会顺茎叶流失掉。上午9点以后 When to spray the best medicine for vegetables? According to our years of trial and error, that afternoon 4:00 to evening this time the best. The reason is: vegetables after a night of low temperature, lush branches and leaves of the water contained in the evaporation, even after 8 o’clock the upper part of the leaves have evaporated, there are still water droplets in the middle and lower leaves. If this time spraying (except powder), will inevitably reduce the liquid concentration, and even will flow along the stems and leaves. After 9 am