20 u00b0 c the photo periodic response time in this crop was 39 days after an average of 16 long days after sticking of the unrooted cuttings plants were pinched 10 days after sticking growth retardants were applied in an average dose of 1 5 gram liter water starting one week after pinching the plants were observed directly during the flowering of this crop the plant is susceptible to powdery mildew no tests were done on cold or drought tolerance this new variety produces medium sized blooms with pink ray florets and yellow disc florets blooming on the plant for 4 weeks this new variety of aster has been found to retain its distinctive characteristics throughout successive propagations however the phenotype may vary significantly with variations in environment such as light intensity and temperature u2018 dukaster u2019 can be planted with assimilation lightning high pressure sodium lamps between week 5 and week 35 under greenhouse conditions in holland from the cultivars known to the inventors the most similar existing cultivar in comparison to u2018 dukaster u2019 is u2018 dynaster u2019 when u2018 dynaster u2019 and u2018 dukaster u2019 are being compared the following differences are noticed the differences of u2018 dynaster u2019 and u2018 dukaster u2019 are 1 flower color 2 anthocyanin coloration of stem 1 the color of the ray florets of u2018 dynaster u2019 is violet while that of u2018 dukaster u2019 is pink 2 in u2018 dynaster u2019 anthocyanin coloration is present in the stem in u2018 dukaster u2019 no anthocyanin is present u2018 dukaster u2019 differs from u2018 diamaster u2019 in 1 flowering response.