ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effectiveness of aerosol fungicide applications in the degreening room for control of citrus fruit decay.

Brown, G. E.; Craig, J. O.;

Proceedings of the Florida State Horticultural Society Year: 1990 Vol: 102 Pages: 181-185 Ref: 9 ref.

1990

บทคัดย่อ

Decay is more severe in degreened fruit because the degreening process itself promotes decay, and because packingline fungicide treatments have to be delayed until after degreening. In an attempt to reduce decay, dry or aqueous aerosol formulations of thiabendazole, imazalil or benomyl were applied to crates or pallets of oranges early in the degreening process. These treatments were compared with aqueous drench applications before degreening and with aqueous non-recovery spray (NRS) applications after degreening. Significant amounts of fungicide residue usually remained on fruit after dry or aqueous aerosol treatments. Aqueous aerosol applications of benomyl were the only aerosol treatments that consistently reduced stem-end rot (SER) caused by Diplodia natalensis [Botryodiplodia theobromae]. None of the aerosol applications effectively controlled green mould caused by Penicillium digitatum. For the control of SER, applications of aerosols during degreening were never as effective as drench treatments applied before degreening, and only occasionally as effective as non-recovery spray treatments applied after degreening. Drench treatments followed by NRS applications were more effective than an aerosol treatment followed by a NRS application. Pre-cooling the fruit before degreening, to induce condensation of moisture on fruit surfaces to improve distribution of the fungicide residues, did not consistently enhance the efficiency of aerosol decay control treatments. This paper was presented at the 102nd Annual Meeting of the Florida State Horticultural Society held at Tampa, Florida, USA, Oct. 31 - Nov 2., 1989.