melanism

1. Insecticide Resistance and Biochemical Mechanism of the Melanism Mutant Strain of Spodoptera Exigua
   甜菜夜蛾蛹黑突变品系对药剂敏感性及生化机理研究
2. The causes, controls and biology of insect melanism are significantly different among different insects.
   昆虫黑化形成的原因与类别多种多样，黑化的遗传调控和分子基础也各不相同。
3. Mechanism for insect melanism
   昆虫的黑化机理

noun

1. a condition characterized by abnormal deposits of melanin (especially in the skin)

   Synonym:    melanosis