Tuesday, August 10, 2010

spider mites




Above pics are Spider Mites and their webs. A friend found them while performing lawn services for one of his customers. He called me and I arrived with camera in hand and was amazed at the size of the webs. Where ever the webs were they appeared to be killing the vegetation. These were a type of water plant that were abundant along the edge of the property bordered by a small lake. The friend gathered some of the web in the pine cone pic which made it easy to see the inhabitants. If you blow up the pine cone pic you can see how small they are and numerous. My friend identified these small spiders (still not sure if these are just newly hatched ones or not) after researching them later in the day.
If found in your garden or yard area, you should take action since they can be very distructive to these areas including your trees. One common way to control them is the the following (copied from a web site)
Various insects and predatory mites feed on spider mites and provide a high level of natural control. One group of small, dark-colored lady beetles known as the "spider mite destroyers" (Stethorus species) are specialized predators of spider mites. Minute pirate bugs, big-eyed bugs (Geocoris species) and predatory thrips can be important natural enemies.
One reason that spider mites become problems in yards and gardens is the use of insecticides that destroy their natural enemies. For example, carbaryl (Sevin) devastates most spider mite natural enemies and can greatly contribute to spider mite outbreaks. Malathion can aggravate some spider mite problems, despite being advertised frequently as effective for mite control. Soil applications of the systemic insecticide imidacloprid (Merit, Marathon) have also contributed to some spider mite outbreaks.

2 comments:

Evil_Klown said...

You can really see them good if you click on the pine cone pic. The things mostly held still which is why I they were just dust. I kept looking closely and finally saw a couple of them moving -- which is how we discovered what they were (plus Googling of course.) Ragmuffin called it from the start - she thought it was insects all along. Those webs are about 10 feet in diameter.

Evil_Klown said...

I just noticed - if you click the pine cone pic it embiggens -- but if you click it again, it embiggens even more.

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