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International Conference on Integrated Control in Citrus Fruit Crops | Integrated control in citrus fruit crops
2003
Citrus fruit rots and their control
2003
Fotouh, Y.O.
Fungicide management and fruit bagging for effective control of fruit rot of `Carabao' mango (Mangifera indica L.) caused by Colletotrichum gloeosporioides Penz.
2003
Baniqued, M.G.B.
Field experiments were conducted in three mango orchards in Mindanao [Philippines]. In four screening trials, the four protectant and four systematic fungicides applied at 10-day intervals starting from 35 DAFI [days after flower induction] up to fruit maturity, significantly reduced the incidence and severity of mango fruit rot, 7 days after harvest. The degree of control of fruit rot afforded by the protectant fungicides ranged from 42-70% on incidence and 69-94% on severity while those by the systematic fungicides ranged from 46-89% on incidence and 95-98% on severity. Under high disease pressure, spraying either mancozeb or azoxystrobin at 7-, 0-, and 14-day spray intervals significantly protected mango against fruit rot. Mancozeb should be applied at least four times at early fruit development (35-75 DAFI) to give 53% control of fruit rot incidence and lower disease severity by 83%. Application of azoxystrobin one or two times provided acceptable fruit protection but three-time applications during fruit development could achieve 95-99.6% fruit rot control. In contrast, five sprays of mancozeb can only achieve 50-75% control. Azoxystrobin is 44% more expensive in these levels of applications, but this is compensated by giving added control efficacy. Under low disease pressure (ECJ Farms), two sprays of mancozeb provided acceptable level of protection. Fruit bagging experiment failed to demonstrate the significant effect of the time of fruit bagging, bagging materials and dimension on the incidence and severity of fruit rot and stem-end rot
Afficher plus [+] Moins [-]Implementing Mating Disruption Control Strategies for Oriental Fruit Moth in Tree Fruit Texte intégral
2003
Breth, Deborah I.
A major educational effort was launched in early 2003 to respond to the increase in internal lepidopteran larvae infestations in apples, peaches, and pears. Several educational events starting with Winter Fruit Schools, a “Worm Management Workshop”, field training sessions, and on-farm trainings increased knowledge of growers and consultants to assist in management strategies for internal lep management. The regional trap line to monitor flight of internal lep pests was instrumental in teaching cooperators how to monitor for these pests, and provided realtime flight activity to compare to theoretical DD models under development. Growers and consultants used the flight activity reports to time controls in 2003. The trend of a 3-4 fold increase in rejected truckloads of apples as seen in PA and VA across the WNY region was prevented by the educational efforts taken through this project. The next step is to continue research to find alternative control strategies that are more compatible with IPM programs in apples and peaches.
Afficher plus [+] Moins [-]Non Conventional Treatments to Reduce Figs Decay Texte intégral
2003
D'Aquino, S. | Palma, A. | Dore, A. | Agabbio, M.
Second crop production fruit of “Bianca” fig was harvested at the eating ripe stage (20 August 2001) and dipped for 1 minute in a solution of cinnamic acid (1% in 96% ethanol) or in ethanol alone (96%). A lot of fruit received no treatment (control). Half of the fruit of the previous treatments were held for 24 hours in an atmosphere containing 400 ppb of 1-MCP at 20°C. Fruit were then stored for 1 week at 15°C and 90% RH and inspected after 3 or 7 days of storage. Ethanol had a negative effect on aesthetical appearance of the peel, which showed large scalded areas. Fruit treated with ethanol in combination with cinnamic acid exhibited the same peel alteration. All treatments reduced decay with respect to control. Weight loss in fruit treated with ethanol either alone or in combination with cinnamic acid were similar to control, weight loss were slighter higher in 1-MCP fruit at both inspection times and after 3 days of storage in EtOH-CA-MCP. Regarding chemical parameters, an overall decrease of pH was observed in all treatments, counteracted by an increase in titratable acidity, with the highest variation in control fruit. In contrast, TSS remained quite stable in all treatments all over the storage period with the exception of control and 1-MCP fruit whose °Brix content decreased of about 1%. Taste analysis, conducted only on healthy fruit, revealed only a slight alteration of sensory quality after 3 days of storage, but fruit treated with cinnamic acid developed an unpleasant “spicy” flavour after 7 days of storage; only EtOH, MCP and EtOH-MCP fruit maintained an acceptable taste. Optimisation of application of these compounds, lower storage temperatures and treatments with 1-MCP at different concentrations at temperatures lower than 20°C, may improve storability of figs.
Afficher plus [+] Moins [-]Chemical weed control in fruit crop nurseries Texte intégral
1996 | 1962 | 2003
Mukula, Jaakko | Maatalouden tutkimuskeskus (MTTK) / Kasvinviljelylaitos / MTT | Maatalouden tutkimuskeskus | MTTK
v | ok | Kirjasto Aj-k | Rikkaruohojen kemiallinen torjunta hedelmäpuu- ja marjapensastaimistoissa
Afficher plus [+] Moins [-]Initiation and control of basidiomycete fruit bodies
2003
Ohga, S. (Kyushu Univ., Fukuoka (Japan))
Effects of magnetic fields on yield and growth in strawberry ‘Camarosa’ Texte intégral
2003
Eşİtken, Ahmet
This study was carried out in a heated greenhouse on the short-day strawberry ‘Camarosa’ as experimental material. Strawberry plants were treated with magnetic flux density fields (MF) of control (natural), 0.096, 0.192 and 0.384 Tesla (T). Fruit yield per plant and average fruit weight were greater at low MF strengths than the control and the high MF strength. Increasing MF strength from control to 0.096 T increased fruit yield per plant (208 and 246.g, respectively), but MF strengths higher than 0.096 T reduced fruit yield. All the MF strengths increased average fruit weight compared with the control, although the largest fruit (8.92.g) were determined at 0.096 T. On the other hand, MF had positive effect in terms of number of leaves, fresh and dry root weight but crown per plant and leaf area was not significantly affected by MF. In addition, high MF strength had a negative effect on plant growth.
Afficher plus [+] Moins [-]A 24-h anoxia treatment reduces decay development while maintaining tomato fruit quality Texte intégral
2003
Fallik, Elazar | Polevaya, Yulia | Tuvia-Alkalai, Sharon | Shalom, Yavin | Zuckermann, Hanna
A short-term anoxia treatment for 24 h significantly reduced rot development in tomato fruit artificially inoculated with Botrytis cinerea compared with control fruit. In fruit treated for 48 h, anoxia significantly inhibited rot development compared with the control, during the first 4 days of the experiment, but the rate of rot development was accelerated from day 6 onward. After 8 days incubation at 20 °C, there were no changes in fruit physical or sensory quality that could be attributed to the 24-h anoxia treatment. However, a 48-h anoxia treatment reduced fruit quality, damaged the fruit and caused off-flavour.
Afficher plus [+] Moins [-]Prospects for integrated control of olive fruit fly are promising in California Texte intégral
2003
Timothy R Collier | Robert A Van Steenwyk
The recent invasion of California by the olive fruit fly has the potential to devastate commercial olive production throughout the state. Fortunately, much is known about this pest in Europe, and prospects for olive fruit fly control in Calif-ornia are good. Effective manage-ment is likely to result from careful monitoring and properly timed chemical control. Suppression of olive fruit fly populations on ornamental and residential olive trees using biological control may also contribute to overall control.
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