most common diseases such redcurrant: anthracnose, powdery mildew American, septoria spot.We consider these in more detail.
This berry bushes are most affected by the fungus psevdopetsitsa.The peak of the disease of red currant, called anthracnose, is in the middle or the end of the summer season.The disease is caused by disturbance of the physiological functions of plants, entailing inhibition of its development, and as a result - a reduction in the harvest next year.The disease affects the red currants are mainly leaves, occasionally slips or berries.In the affected areas appear very small, about the size of one millimeter, brown spots that later turn black.In severe cases the bush reduces its growth by one third, and the harvest - half.
extent of the disease anthracnose this garden culture depends not only on the weather, the variety and age of the plant, but the contamination of the land on which grows red currants.Diseases (photo they are usually portrayed almost naked plants) are expressed in the drying of leaves and premature abscission.Most often it can be observed in stagnating water and in moist and cool weather since mold spores are spread by means of rainwater.To deal with anthracnose need spraying.The ideal drug is one percent solution of liquid Bordeaux.
causative agent of this disease red currant as septoriosis is Desma body Ribisi.On the leaves of horticultural crops produced are round or angular spots, brown at first, and then whitening.Along the edges of lesions formed brown stripes.The leaves dry out and fall off.
Agrotechnical and chemical measures against Septoria is the same as that of anthracnose.Sferoteka morsuve microorganism can cause disease red currant, called the American powdery mildew.The disease not only covers the leaves of the bush garden, but its stalks, shoots, buds, and, of course, grapes.First symptoms of the disease are observed on the apical shoots.The bottom side of leaves along the veins in the lateral lobes covered with white powdery bloom, gradually turns into a dense felt layer with a brown color.The degree of damage depends on the weather of the bush, the varietal characteristics and contaminated sites.The disease redcurrant sharply reduced its hardiness.In addition, the leaves turn ugly, twisted.The spread of the American powdery mildew contributes to a mild winter with lots of snow, creating a greenhouse effect.When dense planting of this disease may die redcurrant almost all other berries, such as raspberries or gooseberries.
AGRONEWS recommend Periodic prevention of this disease, feeding horticultural crops nitrogen fertilizers.From chemicals to combat the American mildew is most suitable solution of soda ash by adding soap.Spray should be doubled at intervals of ten days for about fifteen or twenty days prior to harvest.
Disease Control redcurrant must include pre and their prevention.
