They could have withstood the heat better if more rain.

Jun 06, Pear decline is a disease caused by the tiny foliage-feeding organisms known as pear psylla. The disease may cause pear trees to drop their leaves earlier than normal in late summer or fall. Cankers caused by the bacteria Pseudomonas syringae may cause leaves to drop in early spring. Click to read in-depth answer. Pear tree leaves turn black and fall off when the tree is infected by Fabraea leaf spot.

To check for overwatering, dig a hole about 6 inches away from the base of the tree.

Fabraea leaf spot is a fungal disease whose symptoms are seen in the leaves and fruits. This disease is also commonly called the ‘Black spot’ disease. This disease usually appears late in the growing season. Jun 14, Why Ornamental Pear Tree Leaves Are Dying (Turning Brown, Black or Falling Off) Fire blight emerges in spring just as temperatures warm up and seasonal rain trickles down.

It targets trees right as they begin to bloom, which noticeably damages new growth. As its name suggests, it can look like a fire has burned certain areas of your tree. It is commonly referred to as June drop and is just the tree acknowledging it is carrying more fruit than it can mature. After the excess fruit drops, the fruit left on the tree goes on and matures just fine.

So, if pears abort their own excess fruit like peaches do, that might be what you're seeing with the fruit. Dec 11, A pear tree not leafing out is normal in winter.

Pear trees are deciduous and lose their leaves in winter, but should start producing leaves again in spring.

If spring has come and gone and you notice your pear tree not leafing out, it may have died. In this instance, apply the scratch test. Dec 15, Fungus of one sort or another can cause spots on leaves that may eventually kill the leaf itself, but not the pear tree.

If the leaves were not too badly affected, your crop of pears should not have been diminished by this unsightly fungal problem.

Anthracnose appears as brown. Nov 11, Yellow pear leaves can also be a sign of a number of nutrient deficiencies. If your new leaves are yellow to white with green veins, your tree might have an iron deficiency. Nitrogen deficiency brings on small new leaves and dropped yellow mature leaves. Manganese deficiency causes new yellow leaves with green bands and dead spots. If you notice your pear tree's leaves looking wilted or droopy and they fall off the tree easily, you might have overwatered the tree.

Also look for yellow leaves, especially on newer branches. The.