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Home Brew Forums > Home Brewing Beer > Hops Growing > Damn spider mites....
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Old 06-24-2009, 03:16 AM   #1
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Default Damn spider mites....

Well, I thought it was the thunderstorms and lack of rain that had my hops looking wilted and cooked. Nope... It's the spider mites I just found..
The first leaf I taped gave up a very large, pink, vampire devil.. About half the size of the red angry smiley that signifies my mood about now....

I have huge cones already so chemicals are out.. I've read that Copenhagen and the like soaked in water and sprayed will chase them off. And dish soap/water as well..

What have you guys used, and what's effective?

I blasted all the plants with water just a little while ago, and will be increasing the water schedule to help keep them at bay as well..

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Old 06-24-2009, 08:36 PM   #2
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I've heard of some old timers using a pouch of chewing tobacco boiled in about a gallon of water, mixed with some Listerine (amount unknown), and a couple drops of cheap liquid dish soap (used as a surfactant) to control garden pests, but I cannot vouch for how well it works, or if it works at all.

You could try the beneficial insects, they work well, but are not as immediate as chemicals. Mite Control Regards, GF.

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Old 06-24-2009, 09:36 PM   #3
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I feel for ya man..

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Old 06-24-2009, 10:05 PM   #4
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I had spider mites a few weeks ago, and in my research found that they are actually attracted to excess moisture, as they cannot contain moisture in their own bodies.

So be careful with watering... give your hops just the amount they need, and nothing more.


...

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Old 06-24-2009, 10:44 PM   #5
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Everything I've found contradicts that....

They thrive in hot, dry climates. I'll edit a few google links in a minute.

CSU Page.. half way down under "Life History"

http://www.ext.colostate.edu/PUBS/insect/05507.html

About one third the way through the first paragraph.

http://www.getridofthings.com/get-ri...ider-mites.htm

Also taken from the second paragraph.

"Spider mites are not very keen on moist climates; they need the evaporative properties of an arid climate to reproduce more efficiently"

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Old 06-24-2009, 10:56 PM   #6
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I think I'll try the tobacco approach. I was a Copenhagen user for 20 years, until 18 months ago. I should be interesting to actually get something beneficial out of it after all this time.. Just have to keep it from falling into my lip..

I also read several times about 50/50 water and alcohol. Probably why Listerine would work as well. I read that the alcohol kills them on contact. Maybe I'll try this approach first.

I'll update with the good or bad...

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Old 06-24-2009, 11:04 PM   #7
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Here's another excerpt that I think I like.. Think I'll try this if I can find it. It's an eye for an eye, right?

"Insecticidal soaps are rather mean way to kill mites. Derived from organic soaps like Castile soap, insecticidal soaps kill mites and other plant pests by compromising their cellular integrity, causing cells to rupture and die. In other words, insecticidal soaps dissolve the spider mite from the inside out, slowly turning them into mush. The usual recipe is about 2-3 drops of castile soap for every quart of water. There are premixed commercial applications available online if you don’t feel you have the experience necessary to mix your own insecticidal soaps."

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Old 06-25-2009, 01:39 PM   #8
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Quote:
Originally Posted by gratus fermentatio View Post
I've heard of some old timers using a pouch of chewing tobacco boiled in about a gallon of water, mixed with some Listerine (amount unknown), and a couple drops of cheap liquid dish soap (used as a surfactant) to control garden pests, but I cannot vouch for how well it works, or if it works at all.

You could try the beneficial insects, they work well, but are not as immediate as chemicals. Mite Control Regards, GF.
This place didn't think it is a good idea to use this mixture on food plants

How to Make Bug Spray Using Tobacco, Listerine, Dish Washing Soap | eHow.com

tom
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Old 06-25-2009, 01:45 PM   #9
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back in the day gardeners would chew and then spit the tobacco juice onto plant leaves where bugs were...personally i highly doubt that would harm you if you ingested the plant material but who knows. The dishwashing liquid is no good but the listerine would most likly evaporate. What gives

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Old 06-26-2009, 11:32 PM   #10
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Try this out....
TastyBrew.com | Forum | Hop Spray Mix
I now drop the dish soap down to 1-3 drops for the 1.5Qts.
Good luck....

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