6 research outputs found
Postharvest Quality and Sensory Characteristics of āGranny Smithā Apple Treated with SmartFreshā¢ (1āMCP)
Apple fruit of cv āGranny Smithā was treated with 0.625 Ī¼l/L SmartFreshā¢ (1-MCP) and stored in NA (90% RH, 1 Ā°C) for 16 weeks. After storage, fruits were left for four days at room temperature to simulate market display period (SMP) before analysis. Fruit treated with 1-MCP retained firmness on values very similar to harvest, while control fruit had significantly lower values. No significant differences were observed in the amount of soluble solid concentration (SSC), titratable acidity (TA) and maturity index (SSC/TA).
Fruit colour was significantly affected with SmartFreshā¢ (1-MCP treatment). After storage, b value and Chroma were significantly lower in SmartFreshā¢ (1-MCP) treated fruit. After SMP, significance of differences in b and Chroma values increased to as high as Pā¤0.001 and differences in L and Hue values became significant. Colour differences (ĪEab and ĪHab) between storage and SMP were not significant, but difference in L value (ĪL) was significantly higher in control fruit.
Control fruit had scald index of 2.27, while SmartFreshā¢ (1-MCP) treated fruit had scald index of only 0.27.
Female panelist scores showed the lower quality of control sample in all characteristics, except aroma, while male panelists noticed difference only in colour.
The results showed that SmartFreshā¢ (1-MCP) treatment significantly affects fruit quality of apple cv. āGranny Smithā. Subtle changes in sensory characteristics caused by this treatment are more easily recognized by female panelists
The control of codling moth population using mating disruption technique isomate C/OFM and isomate C TT + OFM rosso FLEX during 2014 growing season in medjimurje region
ViÅ”egodiÅ”nji nasadi predstavljaju monokulturu, a suvremeni uzgoj jabuke u odnosu na ostale voÄne vrste odlikuju velike promjene tehnologije uzgoja (gusta sadnja s mrežama protiv tuÄe i sustavima navodnjavanja) i prihvaÄanje standarda kvalitete (npr. GlobalGAP, "No Residue" tehnologija). JabuÄni savijaÄ (Cydia pomonella) najvažniji je tehnoloÅ”ki Å”tetnik, a njegov prag Å”tetnosti u integriranom programu iznosi samo 0,5 %. U posljednjih 20-ak godina populacija leptira jabuÄnog savijaÄa u MeÄimurju znatno se poveÄala, Å”tetnik je aktivan od zametanja plodova do poÄetka berbe kasnih sorata jabuke, pa je udvostruÄen broj usmjerenih mjera kemijske i biotehniÄke zaÅ”tite. Tijekom 2014. godine u suvremenom nasadu jabuka na lokalitetu NedeliÅ”Äe kraj Äakovca proveden pokus primjene mjere konfuzije primjenom ShinEtsu dispenzora tipa Isomate C/OFM, te kombinacije Isomate CTT + Isomate OFM rosso FLEX (slika na naslovnici). Pored konfuzije mužjaka jabuÄnoga savijaÄa navedeni ShinEtsu dispenzori sadrže i feromone za zbunjivanje breskvina savijaÄa (Cydia molesta). Pokusni dio nasada za primjenu konfuzije pokriven je mrežom protiv tuÄe, opremljen sustavom za navodnjavanje "kap po kap", zasaÄena je sorta jabuke Zlatni deliÅ”es reinders na slabo bujnoj vegetativnoj podlozi M9. Na polovici povrÅ”ine s pokusom konfuzije dodatno su krajem razvoja prve i druge generacije jabuÄnoga savijaÄa primijenjeni insekticidi klorantraniliprol i emamektin. Na susjednoj tabli provodio se standardni program zaÅ”tite i jabuÄni savijaÄ suzbijan je Å”est puta primjenom razliÄitih skupina insekticida (klorpirifos-etil, acetamiprid, klorantraniliprol, metoksifenzoid, tiakloprid i emamektin). Ocjenom zaraze plodova jabuke uzroÄnikom crvljivosti tijekom lipnja, kolovoza i rujna 2014. nisu oÄitane razlike na dijelovima na kojima se primjenjuje mjera konfuzije i standardna zaÅ”tita insekticidima, te se ova biotehniÄka mjera zaÅ”tite pokazala prihvatljivom u suvremenom nasadu jabuke u sustavu integrirane proizvodnje, na dijelu povrÅ”ine pokrivenom mrežom protiv tuÄe.The experiment on codling moth (Cydia pomonella) control using mating disruption technique was conducted in apple orchard with hail nets during 2014 growing season. The efficacy of three commercial pheromone preparations: Isomate C/OFM, and combination Isomate C TT + Isomate OFM rosso FLEX, in comparison to standard pesticides program (chlorpyriphos, acetamiprid, chlorantraniliprole, methoxyfenzoide, thiacloprid and emamectin), was evaluated on the base of number of moths caught in pheromone traps and percentage of damaged fruits. Mating disruption method proved to be very effective if applied to parts of the orchard covered by the network against hail. Between dispenser Isomate C/OFM and combination Isomate C TT + Isomate OFM rosso FLEX there was no difference in the efficacy on codling moth (damage on apple fruits were less than 0.5 %). Compared to the standard chemical control, the parts of the experiment using Isomate mating disruption technique is spent less 4-6 applications of insecticides. This method is acceptable for an integrated and organic apple production
The control of european vine moth population using mating disruption technique Isonet L Plus and Isonet L+E during 2014 and 2015 growing season in north-west Croatian grape production region
U MeÄimurskom su vinogorju dobivena prva pozitivna iskustva primjenom tada nove metode suzbijanja grozdova moljaca: konfuzijom ili zbunjivanjem (Ciglar i sur., 2002; Å ubiÄ i sur., 2003). Postignuto je to i udrugim državama (Barbieri i sur. 1996; Sauer & Karg, 1998; Charmillot & Pasquier, 2000). UÄinkovitost metode konfuzije ili zbunjivanja bila je vrlo uspjeÅ”na, a njezinu moguÄu ekoloÅ”ku i komercijalnu vrijednost u proizvodnji meÄimurskih vina tih je godina prepoznalo regionalno županijsko rukovodstvo sa željom da novÄanom potporom pomogne Å”irenju novog naÄina suzbijanja moljaca. Dispenzori za metodu konfuzije nisu se mogli nabaviti na naÅ”em tržiÅ”tu, pa takva ideja nije ostvarena. Nakon pojave dispenzora tipa Isonet L Plus i Isonet L+E na naÅ”em tržiÅ”tu provjerili smo njihovu djetlotvornost u MeÄimurskom vinogorju. Pokusi su postavljenu u 2014. i 2015. godini, provedeni su na dvije lokacije (OrehovÄak, Železna Gora). UÄinkovitost konfuzije grozdova moljca sa ShinEtsu Isonet ocjenjivana je na tri naÄina: praÄenjem brojnosti leptira feromonskim klopkama u pokusnom i u kontrolnim vinogradima, pregledom i ocjenom zaraze cvjetnih organa i grožÄa nakon razvoja prve i druge generacije liÄinki Å”tetnika i zdravstvenom ocjenom grožÄa u berbi na sivu plijesan (Botrytis cinerea). Metoda konfuzije primjenom dispenzora tipa ShinEtsu Isonet L Plus i Isonet L+E tijekom 2014. i 2015. pokazala se uÄinkovitom mjerom zaÅ”tite od pepeljasta grozdova moljca.European vine moth (Lobesia botrana) is a significant pest in north-west Croatian grape production region (Medjimurje). This pest feeds primarily on the flowers and fruits of grape (Vitis vinifera). Grape vine moth in Medjimurje vineyard region has three generations annually. The first generation if frequently the largest (though not necessarily the most economically damaging) and the third generation is often the smallest. Every generation of the moth can be found in vineyards, however the second and third generations are the most damaging. Larvae in latter generations can seriously affect the mature grape berry harvest directly through larval feeding and indirectly by predisposing the crop to grey mold (Botrytis cinerea). Damage is greater in grape cultivars with compact clusters and/or sensitive to rot (Pinot Noir, Riesling, Sauvignon). A sex pheromone has been identified that is highly attractive to males Lobesia botrana. The main pheromone component has been used to monitor the flight period of males and to disrupt mating as a method of pest control. The experiment on European vine moth control using mating disruption technique was conducted in vineyard (2,5 ha) with sensitive cv. Riesling during 2014 and 2015 growing season. The efficacy of two commercial pheromone preparations: Isonet C Plus and Isonet L+E, in comparison to standard pesticide program (indoxacarb, chlorpyriphos -methyl), was evaluated on the base of number of moth caught in pheromone traps, percentage of damaged flowers and fruits of grape (first and second generations), and a fungal infection caused by Botrytis cinerea. Isonet L Plus and Isonet L+E mating disruption method proved to be very effective against European vine moth in Medjimurje vineyards region
Is TBX agar a suitable medium for monitoring Escherichia coli in bathing water using the membrane filtration method?
The use of a suitable method for the enumeration of indicator microorganisms is of crucial importance for reliable monitoring and assessment of the quality of bathing waters. Among other characteristics, the method should be selective enough and ensure acceptable relative recovery of target microorganisms. This study presents the basic parameters, relative recovery and categorical performance characteristics of Tryptone Bile X-glucuronide (TBX) agar for Escherichia coli (E. coli) enumeration in bathing water samples using the membrane filtration method. The results of the relative recovery study, in which TBX agar was compared against temperature- modified ISO 9308- 1:2014, showed that in order to achieve a satisfactory relative recovery of E. coli with TBX agar at 44 Ā± 0.5 Ā°C, the resuscitation period on a non-selective medium (Minerals Modified Glutamate Agar, MMGA) at 36 Ā± 2 Ā°C is crucial. Incubation on a double-layer MMGA/TBX medium with a 6-h resuscitation period and alternating incubation on single-layer MMGA and TBX agar with a 4-h resuscitation period resulted in acceptable and very similar relative recovery. The achieved performance characteristics of the tested medium, double- layer MMGA/TBX agar, are acceptable. The selectivity was matrix-dependent and was 60.6% for inland and 69.9% for coastal waters. No significant effect of the resuscitation period on selectivity was recorded. Finally, the results showed that when the resuscitation period on a non-selective medium is included, TBX agar is a suitable medium for E. coli enumeration in bathing water samples using the membrane filtration method and that its use, theoretically, would not have negative effects on the assessment of bathing water qualit