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Old 08-19-2014, 06:38 PM   #1
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Default Pest eggs?

Came out today to give my hop plants a little water and I noticed this on one of the leaves...

I didn't have time this morning, but I plan on rinsing the leaves with the hose this evening.



What do you think this is?

Thanks!

--Chris

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Old 08-21-2014, 08:57 AM   #2
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It looks like powdery mildew. I use a product called "Captan" at a dilution rate of about a pinch/gallon and spray it on with a pump up sprayer.

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Old 08-21-2014, 01:09 PM   #3
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That's clearly an egg mass...

Cheers!

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Old 08-21-2014, 03:21 PM   #4
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I agree, that isn't powdery mildew, there would be more spots on the leaves, and the leaves would have started to turn brown at the edges.
I'd be careful using Captan, it is highly carcinogenic.
I'd recommend green cure or several other organic powdery mildew solutions for anything that I will be consuming.

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Old 08-21-2014, 03:34 PM   #5
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I'm not a big fan of chemical pesticides but what is the basis for the statement that Captan is highly carcinogenic? It doesn't mesh well with the results of a quick google search.

Edit_Those look like eggs rather than mildew to me, too.

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Old 08-21-2014, 03:53 PM   #6
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http://www.ncbi.nlm.nih.gov/pubmed/2732908

http://npic.orst.edu/factsheets/captantech.pdf

Just two that I found after a quick Google search.
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Old 08-21-2014, 03:56 PM   #7
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Neem Oil should solve your problem. It's an organic gardening pesticide solution.

2 words of serious caution.

1) Mix it in the concentration described
2) Spray the underside of the leaves

And the MOST IMPORTANT WARNING USING NEEM OIL


Spray it as early in the evening as the sun has begun to set. Neem oil is exactly that. An oil. It smothers the insects and prevents them from being able to attach to the plant. While extremely effective, it will also work as a fantastic magnifying glass on your plant leaves. If you spray it in the morning, heat of the day, or any time where it hasn't had time to dry it will fry your plants. I made this mistake because I used TOO MUCH still after the sun went down. My tomatoes looked like someone had taken a laser and burned hundreds of little brown spots all over everything.

A light spray evenly over your plants should be all you need. Your leaves will have a nice shiny texture. Too much though and you've been warned.

Quote:
Neem Oil
About neem oil
Neem Extracts

This botanical insecticide is extracted from the seed of the tropical neem tree. The active ingredient, Azadirachtin, repels, prevents molting and suppresses feeding. Does not harm humans, birds, plants, or earthworms. Neem has been used for centuries against aphids, whiteflies, thrips, hornworms, leafminers, gypsy moths, weevils, webworms, loopers, sawflies and more. Neem is most effective against insects which pass through all stages of metamorphosis. Use as a last resort, Neem extract can harm beneficial insects.
Neem Oil: Broad Spectrum Insecticide/Miticide

A unique broad spectrum pesticide which acts as an insecticide, fungicide, and miticide. As fungicides, they are most effective when used as a preventative or when disease pressure is light. Works by coating plant surfaces, therefore preventing fungal spore germination and killing external fungi on leaf surfaces. Thorough coverage is important. As an insecticide/miticide, use when insect/mite pressure is light to moderate. Suffocates insects and mites on contact and is especially effective on whiteflies, aphids and other soft bodied insects. Also acts as a repellent. Since this product is an oil, it can also kill bees if they are exposed to direct treatment so we recommend applying this product when they are not visiting your plants.
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Old 08-21-2014, 10:40 PM   #8
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Quote:
Originally Posted by pumpkinman2012 View Post
Well I certainly wouldn't drink the stuff....

You guys are right about it being an egg mass though, I can see that on my computer monitor.

Pyrethrin or Permerthrin is my weapon of choice for dealing with bugs, again, not drinking the stuff or over applying; but following directions and being modest. I wouldn't aim for any hops either.
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Old 08-22-2014, 01:01 AM   #9
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All the pesticides mentioned so far can have nasty side effects. Many are systemic, meaning that this close to harvest, the chemicals will end up in your hop cones (and beer). Unless you have a bad infestation, a little manual work can go a long way. Simply clip off the leaf, or spray it with a strong jet of water.

Just my 2 cents.

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Old 08-22-2014, 01:18 AM   #10
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Neem oil will not have residual effects. It naturally fades of a couple weeks. It can also be mixed in a spray bottle and applied just to infestations.

However, I do agree if this is the only spot you've got a problem then we've jumped the gun on the pesticide stuff. Just clip the leaf and move on.

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