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PRZYDATNOŚĆ APLIKACJI KOMPUTEROWEJ DO WYZNACZANIA OPTYMALNEGO TERMINU ZWALCZANIA ROLNIC W BURAKU CUKROWYM

100%

Jakubowska M. , Bocianowski J. , Tratwal A. , Ławiński H.

nr 3(81)

103-114

The aim of study was an attempt undertaken with Sugar Pfeifer & Langen Poland Industry to develop advisory system for commodity services and sugar beet growers, regarding a decision on the need of chemical control against cutworm. As a result of carried out observations the date of first moth flights, and the total number of the pests on the plantations were determined. Chemical treatments were applied based on the pest warning system, and phenological criteria such as the sum of heat and effective temperatures for the cutworm development. In the study (2009–2014) the chemical control was set on the basis of signaling between 29th and 41th day from the date of mass flight of moths. The date of chemical treatments was determined with the aid of phenological criteria, such as sum of heat in the range from 497.8 to 661.9°C and the sum of effective temperature from 130.6 to 255.8°C.

Biometric characteristics of interspecific hybrids in the genus Secale

75%

Mikołajczyk S. , Broda Z. , Mackiewicz D. , Weigt D. , Tomkowiak A. , Bocianowski J.

nr 2

153-170

Breeding work using European rye populations has resulted in a considerable reduction of genetic variation in breeding materials of that species. Many taxa from the genus Secale may constitute a potential source of genetic variation in rye breeding. A source of new genetic variation can be found in such species as Secale montanum and Secale vavilovii, which are sources of resistance to fusarium ear blight and septoria leaf blotch, while Secale vavilovii may also be a source of sterilising cytoplasm. The aim of this study was to assess the efficiency of crossing the wild species Secale vavilovii and the rye subspecies Secale cereale subsp. afghanicum, Secale cereale subsp. ancestrale, Secale cereale subsp. dighoricum, Secale cereale subsp. segetale with the crop species Secale cereale ssp. cereale, and to produce F1 hybrids and describe selected morphological traits. Observations of biometric traits indicate that the F1 crosses produced may be potential sources of variation for common rye. The greatest variation in terms of all analysed phenotypic traits combined was found for the cross combinations S. c. ssp. cereale cv. Amilo × S. c. ssp. ancestrale and S. c. ssp. cereale cv. Dańkowskie Diament × S. c. ssp. dighoricum. The hybrids showed considerable variation in the analysed biometric traits within individual cross combinations.