Spider mites yellow-green, and their larvae look like little tiny white/grey flecks. These guys are one of the most common pests for hops.
They really love to hide out on the underside of the leaves as this is where plants store their water and nutrients. Ewww...
Spider mites don't like moist conditions so spraying the plants with water helps to dislodge them from the leaves, but also prevents them from being able to reproduce. I had Drew take over and spray down the tops of the plants that I couldn't reach.
Once the leaves dry I'll spray them using a homemade insecticidal soap.
Recipe: 1 gallon of water, 2 tablespoons of Dr. Bronner's soap, and 1 tablespoon of vegetable oil. The vegetable oil helps the soap stick to the bugs better.
I didn't spot any mite webbing on the plants, so hopefully we caught them early enough that this will work. If not, I may need to invest in some more lady bugs or other predatory mites. We don't have any cones on the plants yet, and spider mites do the most damage to the hop cones, so hopefully these little guys will be dead and gone before then.
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ReplyDeleteYou can also use dichotomous earth, which is all natural. That's what we're using to keep the fleas down in our yard, but I know that it works really well for spider mites, too. Basically, it's ground up fossil material, and it will leach away the lipids in their exoskeleton and they will dehydrate quickly.
ReplyDeleteOh wow, thanks Ryan! I have never heard of that before and will definitely check it out.
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