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VCRB :: Contents of Volume 58/2003 :: Detailed information


VALIDATION OF CHEMICAL AND NON-CHEMICAL TREATMENTS AS METHYL BROMIDE  REPLACEMENTS IN FIELD GROWN CABBAGE,  CELERIAC AND TOMATO


Czesław ŚLUSARSKI1, Stanisław J. PIETR2
1 Research Institute of Vegetable Crops Konstytucji 3-Maja 1/3, 96-100 Skierniewice, Poland e-mail: slusarsk@inwarz.skierniewice.pl 2 Department of Agricultural Microbiology, Agricultural University Grunwaldzka 53, 50-375 Wrocław, Poland


Summary

The field experiments were conducted in 2000 and 2001 in central Poland to evaluate the effectiveness of chemical and non-chemical treatments in vegetable (cabbage, celeriac, tomato) production under field conditions. The yield increases of cabbage and tomato following application of dazomet and 1,3-D+CP (1,3-dichloropropene + chloropicrin) integrated with Trichoderma viride B35 were non-significantly lower than those caused by methyl bromide fumigation, and the size of yield improvements in comparison to untreated control was commercially acceptable. The combined applications of lower rates of 1,3-D+CP (300 L per ha) or dazomet (300 kg per ha) with T. viride  were superior to those chemicals used alone at higher rates, 450 L and 400 kg per ha, respectively. In both years celeriac responded to methyl bromide fumigation and alternative treatments much stronger than cabbage and tomato. In 2000, dazomet, methyl bromide and 1,3-D+CP integrated with T. viride B35 significantly increased the marketable yields of celeriac over the control by about 38, 36 and 32%, respectively. Amendments of Indian mustard (Sinapsis juncea) combined with Trichoderma at the planting time had no positive influence on the yields of tested vegetables. The performance of the non-chemical alternative treatment involving the use of straw, urea and T. viride B35 was extremely variable, depending on the crop (negative in cabbage, positive in celeriac). The efficacy of biocontrol agent (T. viride B35) applied alone was inconsistent and unsatisfactory. The results indicated that only the combined application of dazomet with biological control agent T. viride  can be considered as the acceptable alternative to the methyl bromide fumigation. 


keywords:alternatives, biological control, dazomet, dichloropropene, field vegetables, methyl bromide, organic amendments, soil fumigation, Trichoderma, Poland

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