plum tree diseases nz

Hi Peggy it sounds like your tree has what is called Shot Hole this is a common fungal disease of stone fruit and looks like holes in the leaves from a shot gun. Ripe plums will be produced over a month or so.

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It is common in spring especially.

. Common diseases and pests include blackspot powdery mildew leaf curling midge blister leaf mite and codling moth. Winter Apply Kiwicare Organic Super Spraying Oil to dormant trees to. The delicious delectable Plum is probably the easiest of all the stone fruits to grow with less pest and disease problems and a more tolerant nature than for example a Peach or Apricot.

In spring and early summer a diseased tree will develop oozing patches of bark which may be dead and sunken in appearance. The guide below details recommended. Use European varieties to pollinate European varieties and Japanese to pollinate Japanese.

In summer small holes appear in the plum tree. Being aware of these threats and knowing how to report. If you see aphids spray either with neem oil zinc sulfate or add some dishwashing liquid to malathion and spray.

Like most fruit leave the plums on the tree until they are ripe and ready to eat. Beech native Nothofagus spp. While summerfruit are susceptible to a number of pests and diseases already in New Zealand many more exist beyond our shores.

Plum trees will begin to produce fruit at four or five years old. The blister quickly grows and soon covers the whole fruit and they may grow to ten times their normal size. The purpose of this list.

The list helps us target resources to ensure we are. Make sure you only prune in summer months to prevent fungal disease. Ready to respond if any of these.

These pests and diseases of trees are part of Biosecurity New Zealands priority list. Bladder plum infection starts with a small blister on the fruit. A dying or diseased plum tree can be caused by bugs or pests rain mildew bacteria hot and cold weather frost no pollination too much water or a lack of water.

Pests and diseases by tree species. Once petals have fallen from the plum tree check for aphids. Only a few diseases affect plum trees so a very basic organic spray programme will keep the tree healthy and productive.

It over-winters in leaf and flower buds. Bladder plum is a fungus disease similar to peach leaf curl. When favourable conditions are prevalent such as cool wet weather in spring the fungus.

Most Plum varieties require cross pollination.

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