夏季蔬菜遭热害后的表现为:第一,影响花芽分化,黄瓜雌花分化晚而少,甜椒花粉发育不良而脱落;第二,烈日灼伤番茄叶缘、果实,黄瓜等叶缘后,严重枯萎和影响蔬菜的生长;第三,果实着色不良,品质大为降低。防御措施一般有以下几种: 一、选用耐热品种。黄瓜选用津研2号、7号;番茄 The performance of summer vegetables after being harmed is as follows: First, the impact of flower bud differentiation, less and less differentiation of the female flower of cucumber, sweet pepper pollen dysplasia and fall off; second, sun burns tomato leaf margin, fruit, cucumber and other leaf margin serious Withered and affect the growth of vegetables; third, fruit coloring bad, greatly reduced quality. Defensive measures generally have the following: First, the selection of heat-resistant varieties. Selection of cucumber Jin research on the 2nd, No. 7; tomato