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Proceedings of the 6th International Symposium on Fruit Flies of Economic Importance | Sixth International Symposium of Fruit Flies of Economic Importance | 6th International Symposium on Fruit Flies of Economic Importance
2004
Barnes, Brian N.
[Fruit fly control on citrus]
2004
Ware, T. | Grout, T. (Citrus International Research, Nelspruit (South Africa))
Ripening of 'Hayward' kiwifruit treated wtih 1-methylcyclopropene after cold storage
2004
Boquete, E.J. | Trinchero, G.D. | Fraschina, A.A. | Vilella, F. | Sozzi, G.O.
'Hayward' kiwifruit [Actinidia deliciosa (A. Chev.) C.F. Liang et A.R. Ferguson var deliciosa] were stored for 30 days at 0.5 °C and then treated with 0.5, 1 or 5 μl l-1 1-methylcyclopropene (1-MCP) for 16 h at 20 °C. Treated and control fruit were subsequently stored at 20±1 °C to ripen. Control fruit displayed a typical climacteric pattern of ethylene production. Peak ethylene production was measured at 17th day. Ethylene production by treated fruit remained low and they did not show an ethylene climacteric during 32 days of storage at 20 °C. Control fruit softened rapidly to 11.8 N in 4 days but fruit treated with 0.5 μl l-1 1-MCP did not soften to a similar extent until after 18 days. Treated fruit did not soften as much as control fruit but firmness of treated fruit after 32 days was considered appropriate for their consumption. Core tissue of 1-MCP treated fruit softened more slowly than outer cortical tissue. 1-MCP severely retarded changes in lightness and chroma in the outer cortex. Soluble solid concentrations (SSC) remained low in 1-MCP treated fruit for about 14 days. Fruit treated with 0.5 μl l-1 developed acceptable flavor and reached SSC similar to those in control fruit (15.3%) by 28 days. The increase of SSC in fruit treated with 5 μl l-1 1-MCP underwent further retardation. Activity of three glycosidases (β-D-galactosidase (β-Gal), *-L-arabinofuranosidase (*-Af), and β-D-xylosidase (β-Xyl)) increased in control fruit during ripening but only to a limited extent, or not at all, in fruit treated with 1 μl l-1 1-MCP.
Mostrar más [+] Menos [-]Survey of sooty blotch in bagging apple fruits and relationship to the paper bags
2004
Yukita, K.(Aomori-ken. Agriculture and Forestry Research Center, Kuroishi (Japan). Apple Experiment Station) | Akahira, T.
Control of thrips by tape affixation to fig fruit apex
2004
Ichikawa, K.(Aichi-ken. Agricultural Research Center, Nagakute (Japan)) | Naganawa, M.
The seasonal occurrence and the species of thrips to injure the fig fruit were investigated. And, the effect of control to fig fruit apex by the nonwovens surgical tape affixation were examined. Thrips were able to be prevented from invading to fig fruit apex efficiently by the surgical tape affixation. The damage of fig fruit indicated 4.0% by the surgical tape affixation, but 61.0% by the control one. The index of damage by the surgical tape affixation was lower than the control one. The former was 1.3, the latter was 29.0. Moreover, the surgical tape affixation to fig fruit apex indicated the high effect of control to compare with the insecticide treatment.
Mostrar más [+] Menos [-]Thinning before bloom affects fruit size and yield of hardy kiwifruit
2004
Pescie, M.A. | Strik, B.C.
Five-year-old hardy kiwifruit [Actinidia arguta (Sieb. et Zucc.) Miq. 'Ananasnaya'] vines in a commercial vineyard were subjected to thinning before bloom in 1999. Flowers were thinned at four severities: 0% (control), 15%, 30%, and 50% flower bud removal (2-5 June). The average yield of vines thinned 50% was significantly less than that of control vines. However, marketable yield from vines thinned 15%, 30% and 50% was not significantly different from control vines. Thinning, regardless of severity, increased average fruit volume and king fruit volume by 18% and 27%, respectively, compared to control vines. King fruit were more affected by thinning than the two adjacent lateral fruit in the cluster. Thinning before bloom had no effect on percent soluble solids, seed number or total seed weight per fruit.
Mostrar más [+] Menos [-]Genetic control of tomato fruit quality traits Texto completo
2004
Causse, Mathilde, M. | Chaïb, Jamila | Lecomte, Laurent | Faurobert, Mireille | Munos, Stephane | Buret, Michel | Marty, Isabelle | Génétique et Amélioration des Fruits et Légumes (GAFL) ; Institut National de la Recherche Agronomique (INRA) | Sécurité et Qualité des Produits d'Origine Végétale (SQPOV) ; Avignon Université (AU)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
International audience
Mostrar más [+] Menos [-]Genetic control of tomato fruit quality traits Texto completo
2004
Causse, Mathilde, | Chaïb, Jamila | Lecomte, Laurent | Faurobert, Mireille | Munos, Stephane | BURET, Michel | Marty, Isabelle
Evaluation of control measures for Oligonychus afrasiaticus infesting date palm cultivars in the Southern Arava Valley of Israel
2004
Palevsky, E. | Ucko, O. | Peles, S. | Yablonski, S. | Gerson, U.
Oligonychus afrasiaticus is the dominant spider mite pest of date fruit in the Southern Arava Valley of Israel. Growers have dusted fruit bunches prophylactically with sulfur (since 1990), applying as many as five treatments per year, but recently its efficacy has declined. Alternative mite control techniques evaluated in this study to decrease pest damage included: (1) Reducing the overwintering populations; (2) Employing physical barriers to prevent ambulatory and airborne mites from reaching fruit bunches; (3) Exploring the option of using indigenous phytoseiids to control the pest; (4) Applying a single properly timed seasonal acaricide, and (5) Post harvest treatments to mitigate any evident mite damage. Control methods 1-3 did not yield satisfactory results. Mite damage was higher on palms (trees) that had their stems (trunks) scorched in the winter and fruit bunch infestation was not prevented by glue barriers or dense netting. Indigenous phytoseiids were not found on fruit between mid-July till the end of August, when pest populations peaked. In contrast, a single treatment with the acaricides fenbutatin oxide, hexythiazox or abamectin, applied when the first mites were found on the fruit, provided seasonal pest control. The post-harvest re-hydration treatment was also effective, increasing the amount of marketable fresh fruit by approximately 20% on the economically important 'Medjool' cultivar.
Mostrar más [+] Menos [-]Effects of heat treatments on the quality of miniature golden apples (Spondias cytherea Sonn) during low temperature storage Texto completo
2004
Graham, Owen S. (author) | Mohammed, Majeed (author) | Wickham, Lynda D. (author)
Heat treatments of mature-green miniature golden apples produced differential effects in fruit quality of increased skin yellowing but decreased flesh softening and sweetening during storage. However chilling injury (CI) symptoms were not alleviated. Immersion of fruit for 6 or 10 minutes in water at 46°C controlled decay and prevented the development of anthracnose infection compared to control fruit. Fruit treated for 6 minutes developed a pronounced yellow skin colour when stored at 22°C. This intense colour development, indicative of ripening was correlated with firmer and less sweet fruit compared to the control. Treatments at 46°C for 15 or 20 minutes or at 49°C for 10, 15 or 20 minutes prevented anthracnose infection and controlled decay organisms but heat injury was considerable. Neither heat treatments at 46°C for 6 or 10 minutes alleviated chilling injury in fruit stored at 5°C, with symptoms manifested by extensive pitting and brown discolourations, supported by high electrolyte leakage and low bioelectrical resistance measurements indicative of membrane damage due to CI which occurred as early as day 4. Fruit treated at 46°C for 10 minutes and stored at 10°C for 10 days plus 2 days at 22°C had moderate CI while control fruit had slight CI.
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