Agrobiological characteristics of the plum cultivar Jojo grown in the conditions of the Troyan region
2012
Stefanova, B. (Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria)) | Dragoyski, K. (Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria)) | Dinkova, H. (Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria))
The plum cultivar Jojo was introduced into Bulgaria in 2003. It was grafted on the two clone rootstocks St Julien A and Fereley and studied in Troyan region. During the past 9-year period of cultivation the trees developed normally, with more intensive growth in the first 2-3 years. They formed compact spherical crowns, well trimmed with fruit-bearing wood. In the last years, in connection with the more frequent summer droughts and non-irrigated conditions of cultivation, there was some reduction of the growth. After the beginning of its fruiting in the second year after planting and the entering into the period of full fruiting, the cultivar gave regular and high yields, but with different quality of the fruits depending on the climatic conditions. During the whole period of study no symptoms of sharka were found, either on the fruits, or on the leaves of the cultivar. The cultivar showed the resistance to most of the economically important fungal diseases of plum, but it was extraordinary susceptible to Monilinia laxa and M. fructigena, to the same degree as Stanley. Due to its large size and attractive fruits and proved resistance to Plum pox virus (PPV), the cultivars is of interest to the farmers, particularly in regins with a high background of PPV infection.
显示更多 [+] 显示较少 [-]