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what are these yellow dots???


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  #1  
Old 04-27-2010, 12:31 PM
garcrob garcrob is offline
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Default what are these yellow dots???

Is this a nutrient deficiency? Or some kind of insect ?

Let me know if you have seen similar

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Old 04-27-2010, 12:32 PM
garcrob garcrob is offline
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Picture of above question.
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Name:	plantlife 020.jpgYELLOWDOTS.jpg
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  #3  
Old 04-27-2010, 12:35 PM
garcrob garcrob is offline
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Maybe magnesium???
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Old 04-27-2010, 06:12 PM
BIGCREW BIGCREW is offline
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It looks like a lack of nutes or possible spider mites if you have a pocket microscope you will see them usually on the underside of leaves the eggs are little black specs if you see them
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Old 04-27-2010, 07:08 PM
GpsFrontier GpsFrontier is offline
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My first thoughts are a nutrient deficiency, although I wouldn't rule out pests either. But here is a link that lists both the Roles of Elements in Plant Growth, and symptoms of Nutrient Deficiencies. You can even download it in pdf and print it out, although the full document is 25 pages.

HS787/CV265: Fertilizer Management for Greenhouse Vegetables - Florida Greenhouse Vegetable Production Handbook, Vol 3

I would also email the pictures in this tread, as well as the other thread to general hydroponics, and/or the nutrient manufacture of the nutrients you are using, just to see what they think also.

General Hydroponics tech support;
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Old 04-28-2010, 02:51 PM
stella stella is offline
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I think it is probably spider mites, look for the little critters with a mag glass. Treat with pyrethrum, a mild insecticide, if desired.
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Old 06-07-2010, 10:51 AM
garcrob garcrob is offline
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I think it was spider mites, i have noticed this on my j. maple also and a couple others as well. but they havent been progressing, i bought some insecticide and it seemed to work, i dont see any signs of new damage
thanks for the suggestions everyone.

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