Peanut is an important oil crop and cash crop.The infection of penut by aflatoxin of aspergillus flavus causes great influence on the production, processing,and trading of China. The later maturity of peanuts is the critical period of aspergillus flavus infection. Intact and strength of peanut's peel and testa plays an important role to aspergillus flavus infection of peanut. The improvement of the composition and the structure for the peal and testa of penut may produce a new kind of penut with high resist...