title: Host involvement in the improved decay control following NaHCO3 co-application with imazalil.
abstract: In order to improve the treatment efficiency of conventional synthetic fungicides we investigated the relationship between the decay control efficacy and the concentration of imazalil (IMZ) when the fungicide was co-applied with NaHCO3 (SBC) for 2 min. Experiments were carried out using lemon fruit (Citrus limon (L.) Burm .f. cv Verna), either wounded or not before the treatment with 0, 50, 100, 250 or 1000 microg mL(-1) IMZ or the co-application of 3% SBC with 0, 50, 100 and 250 microg mL(-1) IMZ. Wounded lemons were used to simulate and study, the host-fungicide interaction in a potential infection court as affected by the SBC-IMZ coapplication. The occurrence of natural decay was monitored after 7, 14 and 30 days of storage at 8 degrees C and after a 6 day simulated marketing period (SMP) at 20 degrees C and 75% RH. During storage and SMP a comparable efficacy to 1000 microg mL(-1) IMZ, in controlling natural decay development, was obtained with a ten times lesser amount of IMZ when co-applied with SBC. Studies performed following the SBC-IMZ co-application evidenced the induction of natural resistance along with structural changes and an increase of IMZ allocated in the potential infection courts.
authors.affiliation: C.N.R., Istituto di Scienze delle Produzioni Alimentari, U.O.S. di Sassari Traversa La Crucca 3, Loc. Baldinca, IT-07040 Li Punti, Sassari, Italy. antonio.dore@ispa.cnr.it
authors.forename: A
authors.initials: A
authors.lastname: Dore
authors.forename: G M
authors.initials: GM
authors.lastname: Molinu
authors.forename: T
authors.initials: T
authors.lastname: Venditti
authors.forename: A
authors.initials: A
authors.lastname: Petretto
authors.forename: G
authors.initials: G
authors.lastname: D'Hallewin
mesh_terms: D002957:Citrus / Q000187:drug effects* / Q000648:ultrastructure; D004359:Drug Therapy, Combination; D005659:Fungicides, Industrial / Q000494:pharmacology*; D007093:Imidazoles / Q000494:pharmacology*; D008855:Microscopy, Electron, Scanning; D010935:Plant Diseases / Q000382:microbiology / Q000517:prevention & control*; D017693:Sodium Bicarbonate / Q000494:pharmacology*
chemical_list: D005659:Fungicides, Industrial; D007093:Imidazoles; C017435:enilconazole; D017693:Sodium Bicarbonate