บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Biocontrol of postharvest orange diseases by a strain of Pseudomonas cepacia under semi-commercial conditions.

Huang, Y.; Deverall, B. J.; Morris, S. C.; Wild, B. L.;

Postharvest Biology and Technology Year: 1993 Vol: 3 Issue: 4 Pages: 293-304 Ref: 27 ref.

1993

บทคัดย่อ

Biocontrol of postharvest orange diseases by a strain of Pseudomonas cepacia under semi-commercial conditions.

An isolate of P. cepacia which gave good control of green mould decay, caused by Penicillium digitatum, in wounded oranges in the lab. was further tested in procedures used commercially. Valencia and Washington Navel oranges were treated with bacterial cell suspension (1.6 x 109 c.f.u./ml) or the fungicides guazatine and imazalil at 500 micro g/ml on a packing line and stored at 12 deg C for 10 weeks. The bacteria gave significant control of green and blue mould (Penicillium italicum). The control was as good as that provided by commercial fungicides during the first 5 weeks of storage, but decreased relative to the fungicides through to 10 weeks. Waxing with 'Briteseal' decreased the biocontrol effect, but other waxes (Citrus Lustre 402, Carnauba, Zivdar and Citrus Gleam) tested in the lab. did not do so. Neither the biocontrol agent nor the fungicides prevented Alternaria rot. Application of 2,4-D reduced A. rot and generally improved the biocontrol effect on Valencia, but not on Washington Navel oranges. Spraying P. cepacia cells onto Washington Navel oranges 1 month before harvest also reduced postharvest loss mainly due to green mould decay.