TAILIEUCHUNG - Báo cáo nghiên cứu nông nghiệp " Reducing reliance on pesticides and improving food safety through use of Systemic Acquired Resistance (SAR) for disease control in vegetables "

In Mekong delta, mangrove forest distributes along the coastline of 700 km and it is a homeland for mud crab in tropical areas. The mud crab becomes potential to be alternative species from failed shrimp farming. Particularly, mud crab hatchery has been introduced and operated recently at Bac lieu, Tra vinh, Soc Trang, Ben Tre, Kien giang and Ca mau provinces. However, the survival from zoea stage to crablet stage 1 is low at approximately 5%. In addition, like shrimp rearing, the mud crab hatchery is using antibiotic as major treatment to prevent bacteria and fungi. However, antibiotic residues are. | Project Number VIE36IF02 Project Title Reducing reliance on pesticides and improving food safety through use of Systemic Acquired Resistance SAR for disease control in vegetables Vietnamese Institution Southern Fruit Research Institute SOFRI Australian Institution Faculty of Agriculture Food and Natural Resources University of Sydney Commencement Date February 2006 Completion Date July 2006 Objectives 1. To investigate the replacement of fungicides and pesticides with natural or synthetic compounds that induce production of the plant s natural defences to control disease. The response is known as systemic acquired resistance SAR . 2. To investigate the use of GRAS Generally Regarded as Safe chemicals as an effective control of plant diseases. Activities 1 The 2 month field trial conducted on cucumber crops will commence in February 2006 at the SOFRI Research Station. 2 The trial will include 8 treatments with 4 replicate plots of 50 plants plot. 3 The treatments to be applied at fortnightly intervals beginning 7 days after sowing in the trial will be Silica SAR inducer Thiovit Sulfur GRAS protective spray BTH SAR inducer Thiovit Silica Thiovit BTH Tea Tree oil formulation GRAS protective spray Commercial fungicide No treatment 4 Some plants within each block will be inoculated with powdery mildew 48 hrs prior to spraying to ensure there is some disease pressure on the trial. 5 The treatments will be used on their own as well as in combination in an effort to understand the longevity of the SAR response under Vietnamese conditions and disease pressure. 6 The trial plots will be assessed weekly for incidence and severity as described below and the yield and dry weight of the plants will be recorded at the end of the trial. 7 At least one field day using the trial plots will demonstrate the benefits of SAR and GRAS to farmers and researchers. Milestones Expected Date Nb r Milestone Description Deliverables 1 CARD Contract Signed Research Agreement signed. Milestones .

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