Gardening

Lauroceraso hedge


Question: cherry laurel hedge


my hedge and hit by the white mal I have done preventive treatments with sulfur but without results lately the leaves seem eaten how can I intervene Thanks

Answer: cherry laurel hedge


Dear Carlo,
generally the most intense attacks of white mal on the lauraceraso are had in spring, and often these shrubs are picked from a variety of the fungus that besides giving origin to the typical whitish mold, similar to flour, with the passing of the days evolves creating in the foliage of real holes; in addition to this, laurocerases are often affected by diseases caused by bacteria, which pierce the foliage. The two problems, joint, cause plants with a stuffed or chewed appearance. The fight against these two problems must be made at the first appearance of the symptoms, to prevent them spreading to the whole vegetation; if you need to prune the hedge, it is advisable that you do it before the treatments, in order to reduce the quantity of bacteria and fungi to fight against; the resulting pruning wood should be promptly removed from the hedge, and possibly destroyed, avoiding to leave it for a long time on the ground, otherwise the spores of the fungi and the bacteria will have all the time to move on the ground and from there to other plants in your garden. Against parasites of bacterial origin, the best treatment you can do is based on cupric fungicides, to be repeated over a period of 15 days. Instead of powdery mildew, in addition to sulfur, you can look for special synthetic fungicides in a well-stocked nursery, which often give better results in cases of widespread and tenacious mildew. Generally, this type of disease develops on hedges that are too thick, with little ventilation between the branches; you can overcome this problem with pruning, trying to lighten the foliage and favoring good ventilation of all the foliage. In addition to this, it appears that excessive nitrogenous fertilizations, excessively compact and heavy soils, or very acidic, and large amounts of water in the soil, can favor the development of bacterial problems on the laurel cherry hedge. As for humidity, we are at the end of winter, and the climate is typically humid and cool, and it will be even in the coming weeks; this climate also favors the development of powdery mildew, so only preventive treatments can stem the flare up of the disease. As for the fertilizers, try to avoid fertilizers with high nitrogen content, and prefer complex fertilizers, also rich in microelements. And if the soil in your garden is very acidic, or very compact and heavy, think of intervening to improve the dough, like a good weeding, or the addition of sand.