ISHS Acta Horticulturae 820: VIII International Mango Symposium
CONTROL WEED AND PHYTOPATHOGENS MICRORGANISMS IN FRUIT CROPS NURSERY BEDS |
| Authors: | W. Uzcategui, M. Aņez, Z. Ortiz |
| Keywords: | seed plots, sodium hypochlorite, formaldehyde, hot water, disinfection |
| Abstract:
In order to evaluate the effect of sodium hypochlorite, formaldehyde and hot water on disinfecting fruit crops nursery beds, an experiment was conducted in the UNELLEZ nursery at Mesa de Cavacas, Portuguesa state, Venezuela. Experimental design used was a completely randomized with six treatments and four replicates. Each replicate formed by 10 politelyne bags. The treatments were: Check (T0), hot water (T1), formaldehyde 5% (T2), formaldehyde 10% (T3), sodium hypochlorite 2% (T4) and sodium hypochlorite 4% (T5). The variables studied were: weed number, nematode population and units of fungus and bacterial formed colonies (FCU). The determination of nematode was made by floating in sugar method and for FCU by soil dilution method. Statistical analysis used were central tendency measures, descriptive statistical and the non parametric test of Kruskal-Wallis. The most effective treatments for weed control were formaldehyde 5% and 10%. For nematode control, hot water and formaldehyde 5% showed efficacy in reducing the phytopathogen nematodes without affecting the non phytopathogen nematodes. In regard to soil fungus, the formaldehyde 5% was the most effective, because no fungus was obtained in that treatment. In regard to bacterial colonies none were phytopathogen, however all applied treatments reduced bacterial colonies, at least 50%. The formaldehyde 5% and hot water were the most promising to control in weed and phytopathogen microorganisms. | |
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