Pest On Plum Trees Leaves Pictures:

Leaf Cursing Disease (Lecithin Mite)

The Lecithin Mite is a small moth which lives in the soil. It feeds on the plant’s sap and causes brown spots on the leaves. The disease is caused by mites that feed on the plant’s sap.

They are very hardy pests and will survive even if they have been sprayed with insecticides several times before. However, they do not seem to be affected by certain pesticides. Therefore, it is recommended to use the most effective methods of control against them.

How To Control Leech Infected Leaves?

To prevent the spread of leeches infected leaves, try spraying your plants with a systemic pesticide such as imidacloprid or thiamethoxam. These chemicals kill all types of leeches and their larvae within 24 hours. If you don’t want to spray your plants, then you can use other natural methods like soaking the leaves in water and rubbing them off with a soft cloth.

Symptoms Of Leech Infected Leaves:

– Dark brown spots appear on the leaves.

– The spots become larger over time and eventually turn black.

– After several days, the spots disappear completely leaving only dark brown areas left behind.

Caterpillar Infected Leaves

There are many types of caterpillar which feed on plum trees, and one of the most common is the yellow-striped army worm (Spodoptera ornithogalli). The caterpillar has yellow stripes running longitudinally along its body and a black head. It also has brown patches on its skin which help it camouflage itself among the tree’s brown leaves.

How To Control Larvae Infected Leaves?

The caterpillar lives for around two weeks and eats the foliage during this period of time. So, the best way to kill them off is to spray your plant’s leaves with an insecticide which contains Azadirachtin or Neem. Make sure that you apply the spray in the early stages of infection because if the infestation is too severe then these chemicals won’t work.

Symptoms Of The Yellow-striped Armyworm:

– Brown patches appear on the leaves.

– The tree’s growth starts slowing down.

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– The leaves lose their green color and turn brown.

Leaf Rollers

The leaf roller is a type of moth which is known to feed on the leaves of plum trees. It is believed that there are over 200 types of leaf roller moths in the United States alone. The adult moth has a wingspan of around 1 to 1.5 inches and its wing color varies depending on the type.

Some moths have green wings while others have brown or even black wings. The eggs are white in color and are generally laid in clusters on the branches of the tree.

How To Identify A Leaf Roller:

The caterpillars spin silk which is used to roll the leaves and line their nests with it. You can identify the caterpillars by looking out for these nests on your tree’s branches. If the infestation is minor then you can simply prune off the infected areas and burn them to prevent further spread.

However, if the infestation is too severe then you will need to use insecticides to get rid of them completely. We would recommend using Azadirachtin or Neem Oil to control the spread. Make sure that you dispose of the infected branches properly so that no other tree nearby is exposed to the moth’s eggs.

Symptoms Of Leaf Rollers:

– The tree’s leaves start turning yellow or brown in color.

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– The tree doesn’t grow properly and its overall health deteriorates.

– The tree starts growing slowly and is weak.

Sawfly

Sawflies are large insects which have green bodies and yellow stripes or bands running across their bodies. They are related to bees and wasps but do not produce honey. These insects can grow up to 3 cm in length.

The female sawfly’s abdomen has a distinctive T-shape while the males do not have this feature. The larvae of the sawfly has a distinct black head and yellow middle section with black bands.

How To Identify A Sawfly:

The best way to identify a sawfly is by looking at its larvae. The larvae can be found feeding on the leaves of your tree in large groups. They have very distinct appearances which allow them to be distinguished from other types of insects.

How To Control Sawfly Larvae:

The best way to get rid of sawfly larvae is to spray your tree’s leaves with an insecticide containing Neem Oil. The oil will smother the insects and kill them within a few days. It is important to treat the entire tree because if just one of the insects survives then it will continue feeding on your tree’s leaves and cause further damage.

Supplementing your Neem Oil treatment with a fertilizer would be a good idea because the tree will start growing stronger with increased nutrients and will be able to withstand any remaining sawfly attacks.

You can also get rid of the larvae by hand if you aren’t comfortable using insecticides. Wear gloves, a long sleeve shirt and some safety goggles to protect yourself and pick off all the larvae feeding on your tree’s leaves. Place them in a plastic bag and throw them away carefully.

It is important to get rid of as many of the larvae as you can because if just one survives then it could cause severe damage to your tree’s leaves.

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How To Control The Adult Sawflies:

If you aren’t comfortable using insecticides and want to get rid of the adult sawflies then there are a few ways that you can go about doing this.

One option is to set up a trap. Get a large cardboard box and cut holes in the top for the sawflies to enter. Place some tree branches inside and cover them with honey mixed with fruit juice or some other sweet liquid.

The sweet scent will attract the sawflies and they will fly down into the box and get stuck inside the branches because of the honey. You can then throw away the branch with all the sawflies stuck on it.

Sources & references used in this article:

On the California border, exotic pests pose growing problem for California by R Dowell, C Krass – California Agriculture, 1992 – calag.ucanr.edu

Effects of free-range chickens and geese on insect pests and weeds in an agroecosystem by MS Clark, SH Gage – American Journal of Alternative Agriculture, 1996 – JSTOR

How to manage fruit fly (Family Tephritidae) pest damage on different plant host species by take up of physical control measures by M Sarwar – International Journal of Animal Biology, 2015 – files.aiscience.org

Southeastern peach, nectarine and plum pest management and culture guide by D Horton, P Brannen, B Bellinger, D Ritchie – 2010 – athenaeum.libs.uga.edu

A Field Guide to Texas Critters: Common Household and Garden Pests by B Zak – 1988 – books.google.com

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