Pear scabis a fungal disease the symptoms of which are most often observed on pear leaves and fruits. It is common and significantly reduces the yield of a tree, as the fruit affected by scab cannot be eaten. Seedescription and photos that will help you recognize the symptoms of pear scabWe advise the most effectivepear scab sprayingand ways toecological control of scab pear treesgrown in home and allotment gardens.
Pear scab
How to recognize pear scab symptoms?
Pear scabis a disease caused by the Venturia pyrina fungus and manifests itself almost identically to apple scab.
Symptoms of pear scabcan be observed from May, and the development of the disease is favored by long-term wetting of the leaves as a result of rain or fog (9 hours of wetting the leaves are enough for the fungus to easily infect them) and the air temperature within 17-23 ° C.Symptoms of scab are most often seen on pear leaves and fruits , less often on the tips of young shoots and flower buds.
The most commonly observed symptoms of pear scab:
- on leaves- olive-brown spots most often visible on the lower side of the leaf, along the main nerve. The spots increase in size over time, darken and cover with a brown coating (these are spores that infect other parts of the plant). Eventually the leaves die and fall off prematurely,
- on fruit buds- olive-black spots with corking and deformation of the fruit
- on fruit- corking and cracking of the peel
- on the tops of young shoots, which have not yet lignified- olive-brown discoloration and inhibited growth, the bark cracks in these places in the spring of the next year
- on buds- necrosis and dying off. However, infestation of the buds is very rare.
Pear fruit affected by scab
Fig. shutterstock.com
Ecological control of pear scab
Before we reach forchemical spraying on pear scablet's use all available natural methods that will stop or at least limit the development of this disease.
First of all, in areas where pear trees are often infested with scab, avoid planting scab susceptible varieties. In fact, there are novarieties of pear that are completely resistant to scabbut there are varieties that are extremely insensitive to this disease.
Pear cultivars sensitive to scab:Faworytka (Klapsa), Lukasówka, Lawrance, Dobra Ludwika.
Pear cultivars moderately sensitive to scab:Confectionery, Conference, Parisian, Pear William, Packham's Triumph,
Pear varieties highly resistant to scab:Lipcówka Kolorowa, Trewinka, Bera Hardy, Parisian
Afternoticing the first symptoms of pear scab , remove the affected parts of the plants. Fruit and fruit with symptoms of the disease will not be fit for consumption anyway. In autumn, we remove all fallen leaves from under the affected tree, because it is on the fallen leaves that the fungus hibernates to infect the tree the next year. Raided leaves are best burned.
If it is not possible to rake all the leaves,in the fall, during the leaf fall, spray with 5% urea solutionThoroughly spray the entire crown of the tree and the leaves remaining on it, as well as all the leaves that have already fallen.Urea spraying of fruit trees destroys up to 95% of the fungus spores. Urea fertilizer applied in the fall in the form of spraying allows us to reduce the risk of disease contamination in the next season.
More about how to spray urea against scab in the footage. Thanks to this, you will remember better what and how to do it. We invite you to watch an inspiring video: -)
From early spring,preventive spraying with natural strengthening preparationsand immunizing plants against fungal diseases, such as eg Biosept Active. As a last resort, we can reach for the copper fungicide Miedzian 350 SC, which is approved for use in ecological crops.
Spray pear with copper against scabis done in the green bud phase and in the bud break phase, when green leaf cones simultaneously appear.In total, you can spray pear with Miedzian with an interval of 7-10 days. Due to the risk of burns, this agent is only used for the first sprays. Possible later spraying is done with other fungicides.
Since 2018, the range of available anti-scab preparationshas been joined by Evasiol - a natural preparation based on horsetail.
The beneficial effects and high efficiency of spraying with horsetail preparations have been appreciated by ecological gardeners for many years years. Until now, however, you had to collect horsetail herb and prepare preparations based on it, which was quite time-consuming. As a result, many people gave up this valued method.Thanks to the appearance of Evasiol, we have a ready-made horsetail preparationJust dissolve it in water and the spray is ready!
Ecological spraying against pear scabwith the Evasiol preparation we can perform from the flower bud bursting to drying up of the flowers, performing a total of 2-6 treatments at intervals of 7 days.In the same way, we also fight powdery mildew and scab on apple trees, as well as peach leaf curl.
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Pear scab fungicide spraying
Unfortunatelypear scab very easily and strongly infects pear trees , therefore chemical spraying with fungicides is usually inevitable. In addition to the mentioned Miedzian 350 SC and Miedzian 50 WP (only for the first sprays)pear scab is also treated with such fungicides as:
Mythos 300 SC- is used preventively or in intervention from the beginning of vegetation to the end of the flowering phase. Intervention can be used up to 72 hours after infection. So if there wereconditions conducive to pear scab infection , described in the earlier part of the article (leaves moist for at least 9 hours at a temperature of 17-23 ° C), we have 3 days to spray Mythos 300 SC.
Syllit 65 WP - is used preventively from the bud cracking phase up to 60 days before fruit picking, and also as an intervention up to 24 hours after infection.
Magnicur Gold - also recommended for combating apple scab and pear rust, pear trees can be sprayed from the beginning of the flowering phase until harvest, with a 14-day grace period.
W / wpear scab spraying can be done use in amateur cultivation in home and allotment gardens , of course following the principles of careful handling of plant protection products and in accordance with the instructions on the label of each product. In order to achieve the best effectiveness during the growing season, it is worth spraying 3-5 pears, alternately using agents with a different mechanism of action.
All thepear scab spraycan be ordered in the shop of our guide. We guarantee high-quality original products at attractive prices and fast shipping. To see the offer, press the button below: -)
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