过去的许多年，人们把棉花抗虫的能力归功于棉子酚（gossypol），这种棉子酚一般含在棉株的腺体中．因此，过去育种工作都为提高腺体中的棉子酚成分而努力．但最近发现，有些无除体的棉花品系也农现出抗虫性，并且还发现在某些品系中，棉株抗棉铃虫和红蜘蛛的主要成分不是用于? For many years past, the ability of cotton to resist insects has been attributed to gossypol, a gossypol commonly found in the glands of cotton plants. As a result, past breeders worked hard to increase gossypol in the gland. Recently, however, some insect-free cotton lines have also been found to exhibit pest resistance and it was also found that in some lines, the main component of the cotton bollworm and spider mites was not used?