Cherry Leaf Spot Killing Your Trees? Proven Treatment & Control Methods That Work

One spring morning as I was strolling along my garden I saw something strange on the leaves of my cherry tree. We now began to see small purple-brown dots beginning to appear on the surface of the leaf, and in a few weeks or so some of the leaves had begun turning yellow and falling off untimely. Initially, I have thought that it is a seasonal stress or some minor nutrient problem, however, the symptoms were soon to expand to all but a single branch.

Cherry trees are exceptionally beautiful in the gardens of every home, yet at the same time they tend to be affected mostly by fungi diseases, especially when the weather is wet and humid. In instances of moisture not being washed away by wind due to rain and humidity over a number of days, plant pathogens thrive perfectly in the condition, as they have the moisture on the leaves that they need to reproduce. These early symptoms in my case, proved to be the onset of the cherry leaf spot disease, which is among the easiest trouble to cherry trees.

To gardeners, it is paramount to know the warning signs the first one. Purple or brown spots, leaves turning yellow and premature defoliation may be slighted at first sight but most times they begin to mark the onset of a fungi infection. Early identification and initiation of the cherry leaf spot treatment is likely to halt the effects of the disease and contribute to the overall health and fruit of the tree.

What Is the Cherry Leaf Spot Disease, and why does it spread so quickly

Cherry leaf spot disease is caused by a fungal pathogen which attacks the leaves of sweet or tart cherry tree. Once the fungus has developed the disease on the surface of the leaf, the fungus then generates spores that can spread at an extremely high rate in case the environmental conditions are conducive.

The ordeal of heat and moisture causes very favorable conditions to be conducive to infection. Rain soaks spores of fungi on sick leaves and deposits them on other leaves and due to lack of good air circulation in large trees canopies, moisture is left on the leaf. These conditions enable the spread of the cherry leaf spot disease pathogen within the leaf all the faster and even between the trees located close to each other.

Nurse gardeners usually under-estimate the speed at which this disease may come. Cherry leaf spot may affect a healthy-looking tree before the end of the growing season without immediate cherry leaf spot control of the disease by doctors. That is why it is necessary to choose the most best fungicide for cherry leaf spot and preventive treatment in order to have healthy trees.

The University of Minnesota Extension states that one of the most widespread funguses of tart and sweet cherry trees is the cherry leaf spot that may lead to serious defoliation without treatment.

Detection of the Early Symptoms Before Trees Become Weak

How to treat cherry leaf spot? Initial manifestations of this disease is normally the presence of small red or purple and reddish brown spots on the upper leaf surface on cherry. With the progression of the infection, the spots get larger and possibly fuse together forming irregular patches. A growth can occur on the bottom of the leaf with tiny structures of fungi that secrete spores that propagate the infection further.

The infected leaves start turning yellow with time and in due course they fall off the tree. Repeated loss of leaves is a weakness to the tree since it decreases the potential of the plant to generate energy through photosynthesis. The yearly act of defoliation makes the tree susceptible to winter damage, pests and other diseases.

Since the symptoms come overnight in most gardens, many homeowners start to search as to how to treat cherry leaf spot as they realize that they have the problem. The cherry leaf spot treatment can be easily slowed down by applying a suitable cherry leaf spot spray and early commencement of cherry leaf spot treatment, which will ensure the tree does not suffer serious damages.

In a study conducted by the Michigan State University Extension, they note that timely leaf spot symptoms recognition is of the essence as reassuringly frequent defoliations eventually results to cherry trees becoming weakened and fruit yield gets low.

Cherry Leaf Spot Control in Gardens

Prevention is one of the other most significant things I learnt in my garden because prevention is very essential in the management of diseases. Others such as fungal infections such as cherry leaf spot can be reduced significantly through simple gardening practices.

Sanitation can be considered to be one of the initial actions. The fallen leaves that have fungal spores should be taken away and their residues should not remain in the garden. Such infected leaves may carry the pathogen through winter and be an inoculum in a new season.

Another practice that is necessary is pruning. Horticulturists can enhance the level of humidity in the leaves by eliminating jammed branches and by boosting air circulation through the canopy. Improved air circulation will enable the leaves to dry quicker following rain or irrigation and therefore less opportunities useful by fungal pathogens.

The prevention of overhead watering also prevents leaf wetness that is a major determinant when it comes to the development of fungal diseases. The cultural practices are the basis of successful cherry leaf spot management and enhance long term cherry leaf spot organic treatment procedures.

Sanitation of orchards and accurate irrigation habit are suggested by the USDA plant disease management program as effective methods of minimizing the pressure of fungal diseases in fruit trees.

Using Cherry Leaf Spot Fungicide to Protect Cherry Trees

How to cure cherry leaf spot? In case environmental conditions are highly favorable to the development of the disease, preventive application of fungicides can be required to secure cherry trees. The fungicides serve as shields to ensure that the healthy leaves are not infected by fungal spores.

Gardeners normally use a best fungicide for cherry leaf spot at early leaf development stages when the new leaf is mostly susceptible to an infection. They can be used consistently in the growing season and it can greatly help in curbing the spread of the disease.

A variety of factors such as the severity of the infection and the weather conditions in the place determine the best fungicide to be used on cherry leaf spot. To a significant extent, it is possible to have a properly-designed spray program which will assist the gardeners to know how to treat the cherry leaf spot before it produces a serious level of defoliation.

According to research of the Plants Disease Journal, regular fungicide programs effectively lower the severity of the leaf spot abduction in commercial orchards of cherries.

Trichoderma-Based Solutions in the Biological Control

Over the past few years, biological management of the disease has been an area that has been sought by many gardeners and orchard growers as a means of sustainable gardening. Among the promising ones is the application of useful microorganisms like the Trichoderma species.

Trichoderma based products are used as tricho fungicides, which are natural biological fungicides that prevent pathogenic organisms that cause leaf spots. Some favorable fungi such as Trichoderma harzianum for cherry leaf spot treatment​ occupy the plant surface where they save space and nutrients with the pathogenic fungi. They also secrete enzymes which prevent the growth of pathogens.

Application of biological solutions like FloraEgis Trichlora foliar spray fungicides enable gardeners to use natural cherry leaf spot spray that will be helpful in supporting cherry leaf spot organic treatment. These biological products, combined with correct management of pruning, sanitation and irrigation, may be incorporated to become an effective integrated cherry leaf spot control plan.

Conclusion

Prevention of fungal fungi in trees is a crucial aspect in the cherry leaf spot control in the fruit trees and should be done with care and some patience. Small spots on the leafless may mark the onset of cherry leaf spot, however when negligence is ignored it can make trees weak and produce low fruits.

Gardeners can save their trees serious infections by the discovery of early symptoms, license cleanliness of their gardens, and use of timely cherry leaf spot treatment. Regular care is important in the management of diseases whether fungicides are applied or the biological approach is applied.

Some of the sustainable solutions entailed beneficial microbial sprays and proper management of orchards give gardeners viable alternatives to control fungal issues but do not harm the ecosystem around the orchards. With these strategies in place, there would be easy management to take care of healthy trees and guarantee the fruitful harvests every season. Now you know that how to treat cherry leaf spot is not a rocket science. 

Reference: 

• Saksirirat, Weerasak, Punyisa Chareerak, and Wandee Bunyatrachata. "Induced systemic resistance of biocontrol fungus, Trichoderma spp. against bacterial and gray leaf spot in tomatoes." Asian J Food Agro-Ind 2 (2009): S99-S104.
• Vitti, Antonella, et al. "Sustainable agricultural practices in disease defence of traditional crops in Southern Italy: The case study of tomato cherry protected by Trichoderma harzianum T-22 Against Cucumber Mosaic Virus (CMV)." The Sustainability of Agro-Food and Natural Resource Systems in the Mediterranean Basin. Cham: Springer International Publishing, 2015. 133-143.