บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Acquired resistance of Penicillium digitatum and Penicillium italicum to some postharvest fungicides on navel oranges.

Mahmoud, M. B.; Hanafy, S. M.;

Annals of Agricultural Science (Cairo) Year: 1991 Vol: 36 Issue: 2 Pages: 681-691 Ref: 19 ref.

1991

บทคัดย่อ

Acquired resistance of Penicillium digitatum and Penicillium italicum to some postharvest fungicides on navel oranges.

The incidence of P. digitatum and P. italicum isolates sensitive to, and tolerant of benzimidazoles and imidazoles was investigated following the infection of oranges with sensitive isolates and treatment with thiabendazole, benomyl, SOPP (sodium orthophenylphenate), imazalil and prochloraz. Fungicide tolerance was greater in P. italicum than in P. digitatum. P. italicum was tolerant of thiabendazole when the infected fruits were treated with a mixture of thiabendazole and imazalil, while P. digitatum did not acquire tolerance of thiabendazole when the fruits were treated with the same mixture. The infectivity of the conazole-tolerant (imazalil, prochloraz) isolates was lower than benzimidazole- (thiabendazole, benomyl) and SOPP-tolerant isolates. A degree of tolerance was maintained after 14 weekly transfers, inoculation and recovery from untreated fruits. It is concluded that a mixture of thiabendazole and imazalil is an effective strategy for the control of fungicide tolerant isolates and reducing the emergence of tolerance of postharvest fungicides.