发面用的小苏打 (碳酸氢钠 )属弱碱性物质 ,p H值在 8以上 ,能抑制许多病菌孢子的形成 ,使新生孢子失去传染能力 ,可以用来防治瓜菜的病害 ,使瓜菜不发病或减缓病害的蔓延。用小苏打防治瓜菜病害的方法是 :将小苏打配制成0 .2 %浓度的溶液 ,然后用喷雾器向瓜菜均匀喷洒。一般喷 Baking baking soda (sodium bicarbonate) is a weak alkaline substance, p H value of 8 or more, can inhibit the formation of many bacteria spores, so that the loss of infectious ability of conidia can be used to control the disease of vegetables, so that melons No disease or slow down the spread of disease. With baking soda to prevent diseases of vegetables are: the baking soda formulated into 0.2% concentration of the solution, and then spray evenly to the vegetables. General spray