8Gera A, Loebenstein G, Raccah B. Protein coat of two strains of cumumber mosaic virus affect transmission by Aphid gossypii [ J ].Phytopathol, 1979,69: 396-399.
9Nielsen,K. Yohalem, D S Jense. PCR detection and RFLP dif ferentiation of Botrytis species associated with neck rot of onion[J].Plant Dis, 2002,86: 682-686.
10Navarro L, Roistache C N, Murashige T. Improvement of shoottip grafting in vitro for virus-free citrus[J]. J Amer Soc Hort Sci, 1975,100(5) :471-479.
