The itsy bitsy spiders…they’re everywhere!
Pictured above is a juniper with what looks like fur. Those are Spider mites. They live in dense evergreens. Spider mites are no big deal to outdoor trees and shrubs most of the time but, when the infestation gets really dense to the point of showing the fur, they will cause damage. Their natural enemy is larger spiders and bugs but the larger bugs can’t keep up.
Rain is what keeps them in check. I’m sure you’ve heard ‘down came the rain and washed the spider out’.
Since we have not had rain, these little buggersare having their way with the evergreens.
The best thing to do now is to hose down your evergreens, spray them off with a hard stream. You can also get one of those feeders that you put at the end of your hose. Put about a teaspoon of dish soap in it and
spray the trees and shrubs with soapy water. You may have to do this once a week, but it is much better than using chemical.
Dormant oil at the beginning of the season is very helpful. This suffocates the early overwintered eggs and
gets rid of the initial generation. While that doesn’t sound like much, it is a great help. It is too hot now to use dormant oil so, for now, wash your evergreen shrubs and trees.
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