Grain yield of winter wheat and its quality in relation to fungal disease development and climatic conditions in 2000-03
2004
Jaczewska-Kalicka, A. (Institute of Plant Protection, Poznan (Poland). Regional Experimental Station, Chylice), E-mail: a.a.kaliccy@pf.pl
Four-year plot experiments with winter wheat cvs. Kobra and Mikon were conducted in the Agricultural Experimental Station of Warsaw Agricultural University at Chylice, Mazowieckie voivodeship (Poland). Fungicidal treatments were performed twice, at shooting phase (GS 30) and at the beginning of earing (GS 51) using the newest plant protection products designed for controlling complex of fungal diseases on winter wheat. Weather conditions in the experimental years were differentiated. This was particularly related to the periods of intensive growth and ripening of winter wheat (April-July), while the deficiency of rainfall markedly influenced the development of fungal diseases, as well as the quality of grain. In 2000 a severe drought occurred, in the years 2001 and 2003 weather conditions were similar to standard values, and in 2002 this period was characterized by relatively low rainfall. The above conditions affected the occurrence and severity of fungal diseases, as well as the amount and quality of grain yield. In the years 2000-03 winter wheat grain yield in treatments with fungicidal protection was higher on average by 26.12 percent in the interval from 7.34 to 53.15 percent and thousand grain weight was higher on average by 11.47 percent in the interval from 2.00 to 22.12 percent
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