A little later the variety Renkloda Ulena matures. The tree grows quite vigorously, creating a wide crown. It starts bearing fruit early and bears fruit abundantly and annually. It produces spherical fruit, medium size, with a greenish-yellow or golden-yellow skin, covered with red spots, speckled and rusted. The flesh is yellowish, juicy, tasty. The fruits ripen in the first half of August.
There are two Hungarians in the selection for allotment and home gardens – Wczesna Hungarian and Dąbrowicka.
The first one is a variety of unknown origin, in Poland, it is very widespread and appreciated for its fertility and frost resistance. The tree forms a lofty crown, conical, quite dense. It starts bearing fruit very early, it bears fruit very abundantly, annually. It is sufficiently resistant to frost. Resistant to diseases and pests. It produces medium-sized fruit, about weight 32-38 g, flattened on the sides, sharply ended. Dark navy blue skin with a blue coating, thin, strong. Yellow flesh, strict, juicy, aromatic, very well detached from the stone. The fruits usually ripen around mid-August, right after the fruiting of the Rhine-Klody Ulena. They fall strongly before harvesting. They can be harvested a few days before they are fully ripe, when they are not all navy blue yet, (which should not be done with other varieties of quill).
Hungarian Dąbrowicka is a new variety, bred in the Fruit Experimental Station in Dąbrowice near Skierniewice. It bears large fruit, dark blue in color, ripening at the end of August, so a few weeks before the Hungarian Ordinary, which is not recommended for amateur crops, because the quality of the fruit is inferior to other varieties.
Althana green leaf is valued for its excellent taste and nice appearance of the fruit. The tree grows vigorously, starts bearing fruit early and bears fruit abundantly. The fruit is large, with a red-blue skin, covered with purple coating. The flesh is greenish golden, juicy, very tasty. The fruits ripen at the end of August.
Stanley is the latest ripening plum of choice – American variety, highly valued for its high fertility and splendid fruit. The tree forms a lofty crown, of various shapes, between the ball and the cone, loose, not very symmetrical, with hanging branches. Begins to bear fruit early, regularly and annually. The fruit weighs 40-50 g, they are ovate, narrowed at the peduncle. They have a dark blue skin, covered with a strong blue bloom, the flesh is yellow, aromatic, juicy, sweet. The fruits ripen in early September.
Plum diseases and pests
The most serious and dangerous disease of plums is pox, called "shark", caused by Prunus Virus 7. The symptoms of the disease appear both on the leaves, and on fruit. The leaves are white and yellow in different shapes (chlorotic) stains, which show up after flowering. They appear on the fruit (a few weeks before maturing) purple spots, gradually darkening. In these places the flesh is discolored. The fruit becomes unpalatable and unfit for consumption. Unfortunately, infected trees must be removed. To prevent this disease, aphids must be carefully combated.
There is a plum cyst in the coastal belt and in the foothills, caused by the fungus Taphrina pruni. Symptoms appear only on fruits and on the youngest seedlings. Infested fruit, the so-called. cysts, are strongly distorted, elongated and pitted. Their flesh is leathery and tasteless. This disease is combated, by spraying trees shortly before bud break: Cresote-lem – 1%, Sillite – 0,5% or Miedzian 50 – 1% and again in the white flower bud stage: Syllite – 0,1% or Miedzian 50 -0,2%. You also need to collect and destroy cysts.
Plum is also affected by the brown rot of stone trees, which is manifested by the appearance of gray-brown spots on the fruit during ripening with concentric yellow-brown nodules. Some of the infected fruit fall off and rot, some remain in the form of a mummy. They are combated by spraying, during the white bud period, copper 50 – 0,1%.
A dangerous pest that causes "worming."” the fruit is a plum fruit. Caterpillars hibernate in cocoons under the bark of trees or on the topsoil. They are fought against, spraying trees then, when the pest is in the egg development stage, known as the "black head."”, preferably as recommended by the plant protection service (usually around mid-June).
A common pest of plums is the plum bowl, which sucks the juices from the twigs. When it appears en masse, can destroy a tree. The presence of this pest is evidenced by convex ones, brown discs approx 5 mm, located on young twigs. This pest is controlled by spraying leafless trees with Cresotol – 1% and during the growing season, in the early white bud stage. 50 in concentration 0,15% or the Sadophos of Col.. 30 – 0,3%.
Prunes pests also include the yellow-legged fruiting body and the pale red fruit. They are very dangerous pests, often completely destructive of the young, developing buds. Spraying with Insectofos should be done at the end of the flowering of trees.