Various diseases and pests that attack pear leaves are observed every year in pear orchards. These types of pathogens are dangerous because they spread frequently from leaf to fruit or other parts of the pear tree.Pear leaf diseasesalso have a negative effect on the overall appearance of the plant and weaken it considerably. Learn how to correctly identifypear leaf diseases , how to combat them effectively and when to spray them.
Pear leaf diseases. Dark spots on the leaves
may indicate that the plant was attacked by pear scab.
Pear scab
Pear scabis caused by fungi. Symptoms of pear scab appear on leaves, fruits and shoots and it is the most commonpear leaf diseaseOlive-brown spots appear on the pear leaves, on their underside, along the main nerve, which darken over time. until they turn black. Leaves die and fall prematurely. Stains also appear on the fruit buds, and with time they become dry and corky. Scabs also appear on the top parts of shoots.
The source of the disease is the mycelium hibernating on pear leaves and infected shoots.Combating pear scabis primarily removing infected leaves and fruit. The removed leaves must be burnt or deeply buried, they are not suitable for compost.
Pear scab sprayingstarts with the emergence of green leaf cones and repeats every 10-14 days. It is also possible to use fungicides, the same as with which apple scab is controlled.In the initial period, copper surface fungicides were used (eg Miedzian 50 WP, Miedzian Extra 350 SC) and those containing captan (Kaptan Zawiesionowy 50 WP, Captan 50 WP, Merpan 80 WG). As far as possible, in amateur cultivation, it should be limited to copper (the preparation is allowed for organic farming). If necessary, from the white bud phase, deep and systemic spraying of the pear is applied, such as, for example, Dithane NeoTec 75 WG, Syllit 65 WP, Magnicur Gold, Score 250 EC.
Pear leaf spot white
White spot of pear leavesis a fungal disease that affects only pear leaves. The fungus causes round or irregular spots, 3-5 mm in diameter and light brown in color, to appear on the leaves. As the disease progresses, the spots increase in size, causing the leaves to fall prematurely from the tree. The pathogen hibernates on fallen, infected leaves.
Combating white spot on pear leavesis, similar to scab, removing infected leaves.Pear scab fungicides are also effective against white spot on pear leaves. Lukasówka and Faworytka are the varieties particularly sensitive to the white spot of pear leaves. Avoid planting these varieties if your garden has already experiencedwhite spot of pear leaves
Pear leaf diseases. Pear rust manifests as orange spots.
Conical clusters of fungus spores appear from underneath the spots.
Pear rust
Pear rust is one of the most characteristic and easily recognizable diseases of pear leaves. Pear rust is particularly vulnerable when it grows in the vicinity of the Sabine juniper, as this species is an intermediate host of the fungus that causes pear rust. Bright red spots on pear leaves have been observed since spring. The leaves thicken and stiffen in these places. In summer, yellow, conical and raised spore clusters with a diameter of approx.1 cm and 3-4 mm high.
Combating pear rustis primarily removing infected leaves from trees and cutting out junipers growing nearby. Especially if you can see signs of juniper rust. Spraying on pear rust is performed with the same agents as against scab.
If the symptoms of damage we have observed on our trees do not indicate the above-describedpear leaf disease , it is worth checking whether the damage is causing the damage are notpear leaf pests
