Hi friends! Today I’m going to tell you how I got rid of spider mites on my Dwarf Alberta Spruce.
1. Diagnose the Problem
Before tackling the problem, you need to make sure you’re dealing with spider mites. Place a clean sheet of paper under the spruce and gently shake it. Then, fold the sheet in half and rub what fell from the spruce. If the sheet becomes smeared, it’s spider mites.
Additionally, use a magnifying glass to check the needles and branches of the spruce. You should see very fine webs and tiny insects about the size of a grain of sand.
2. Ensure Adequate Air Movement
From my experience, spider mites affect plants in dense areas of the garden with very little air movement.
One function of the webs that mites weave is to protect their eggs and offspring from the wind. Spruces that grow in open areas and are well-ventilated by the wind are much less likely to be affected by spider mites.
So, ensure good air circulation around your Dwarf Alberta Spruce. This will greatly hinder the mites’ ability to reproduce.
3. Rinse Spider Mites Off With Water
The next step is to wash the spider mites off with water. These pests dislike moisture and spread mainly in dry, warm weather.
Simply spray your Dwarf Alberta Spruce with water from a hose. Try not to use too much water to avoid making the soil around the spruce too wet. Repeat this several times with a 2-day interval.
4. Use Horticultural Oil and Miticide
Next, spray the spruce with horticultural oil. This product works well against various pests, including spider mites. You can prepare your own solution or use a ready-made product.
I also recommend spraying the Dwarf Alberta Spruce again, but this time using a miticide. This is a product specifically designed to combat mites and is very effective.
The problem is that miticides are hard to find in free sale and are usually used only by companies specializing in pest control. If you have the opportunity to use a miticide, do it.
5. Use the Predators
Good results can be achieved by using natural enemies of the mites, such as Phytoseiulus persimilis. You will find a variety of predator insects available for sale that destroy spider mites. Just buy them and spread them on the spruce.
Warning! Using predators to destroy mites excludes the use of horticultural oil or miticide. If you spread predators on a sprayed spruce, they will most likely also die.
6. Take Care of the Dwarf Alberta Spruce’s Immunity
After many years of growing Dwarf Alberta Spruce, I can say that if it has good immunity, it can independently resist spider mites.
First of all, this concerns feeding. Fertilize your spruce once a year with a slow-release multi-purpose fertilizer. If the mite has affected your spruce, water it with a liquid fertilizer for conifers.
Do a preventive treatment of the spruce with fungicide and insecticide at least once a year. This will greatly improve the tree’s immunity.
Also, regularly clean out old needles and the center of the crown. This will improve air circulation and reduce the risk of infestation. Remove dry branches as soon as they appear.
🌲Do you have any questions? Ask in the comments!🌲
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