jaygrow Posted July 30, 2006 Share Posted July 30, 2006 Hi all, Well, I'm a few days/a week away from chopping my plants, and just wanted some feedback on this leaf pattern: Not the best example, as it's more the orange spots I'm wondering about, not the leaf tips. This has affected one plant in particular, and with the heat in the past few months (and so in my growroom....) and looking at other FAQ's, it has always looked to me like a simple case of light/ radiant heat burn....... Am I right In saying this? It is also the plant closest to the desktop roating fan, so could it be wind burn???? Just interested in what you guys think? Link to comment Share on other sites More sharing options...
SnAp CrAcKLe pOp Posted July 30, 2006 Share Posted July 30, 2006 (edited) the leaf is burning at the furtherest part of leaf from the light so i dnot think its heat related. More like nute burn or a combo of heat and nute build up. Just had a closer look the orange spots my be caused but a mite have a look under leaves, and aslo take a small leaf and look into sun for small holes. The holes would normally be caused by bugs. Are you folia feeding? that could also be the cause if temps are high. As you only have a couple of weeks left i wouldnt do anything too drastic just lower EC and maby use Neem on bugs if you find. Edited July 30, 2006 by SnAp CrAcKLe pOp Link to comment Share on other sites More sharing options...
obscure_shadow Posted July 30, 2006 Share Posted July 30, 2006 with only a week or two to go, i wouldnt worry about it, the leaves tend to get weaker twards the end of flowering anyways. shadow Link to comment Share on other sites More sharing options...
Guest RAZ Posted July 30, 2006 Share Posted July 30, 2006 Looks like a deficency to me.......... RAZ Link to comment Share on other sites More sharing options...
oldtimer1 Posted July 30, 2006 Share Posted July 30, 2006 Its a leaf spot fungus. I've seen this before, its very very infective. For future grows the following protocol has been used and proved effective. The way out is fast growth, ie a lot of light, good air exchange, protection with probiotic bacteria and fungi ie use BioLife. To make up BioLife ignore the instructions, bubble a litre of warm water [35c] for an hour, bring the temp back up to 35c stir in a level tea spoon of black treacle and add a gram of inoculant, leave to bubble overnight. At the same time leave 2 or 3 litres of water to stand overnight to allow chlorine to evaporate, if you can bubble it all the better, mix the two in the morning, spray the plants then water the surplus through the compost. Chuck any excess or use on any other plants you want to inoculate. Final point when spraying only use the sprayer at low pressure, too high a pressure will burst the membrane of larger fungi strains such as tricoderma. Also do not use internal pumps with venturi valve for added aeration, the water being drawn through the impeller again will shred the fungi. 2 Link to comment Share on other sites More sharing options...
jaygrow Posted July 30, 2006 Author Share Posted July 30, 2006 (edited) Its a leaf spot fungus. I've seen this before, its very very infective. For future grows the following protocol has been used and proved effective. The way out is fast growth, ie a lot of light, good air exchange, protection with probiotic bacteria and fungi ie use BioLife. To make up BioLife ignore the instructions, bubble a litre of warm water [35c] for an hour, bring the temp back up to 35c stir in a level tea spoon of black treacle and add a gram of inoculant, leave to bubble overnight. At the same time leave 2 or 3 litres of water to stand overnight to allow chlorine to evaporate, if you can bubble it all the better, mix the two in the morning, spray the plants then water the surplus through the compost. Chuck any excess or use on any other plants you want to inoculate. Final point when spraying only use the sprayer at low pressure, too high a pressure will burst the membrane of larger fungi strains such as tricoderma. Also do not use internal pumps with venturi valve for added aeration, the water being drawn through the impeller again will shred the fungi. Hi OT1, what you've said (leaf fungus) sounds about right. So much for my heat burn theory Would the high temperatures (85*F ++) contribute towards this fungus, or can it just as easily develop at lower/normal temps? It has not spread to my other plant, which is right next to it in the growroom, but instead seems to have concertrated on engulfing every single leaf on the original plant. The affected plant is at the back, with the plant in the foreground healthy, with slight tip-burn) Thanks for the advice on how to combat it. As I said, I'm close to chopping so I'll leave the affected plant this time round. If I do ever get this probelm again in future grows, I'll be able to tell what it is, and know how to treat it. JG Edited July 30, 2006 by jaygrow Link to comment Share on other sites More sharing options...
oldtimer1 Posted July 30, 2006 Share Posted July 30, 2006 From what I can see its the same fungus, damage to the leaves will be more rapid and greater with high temperatures, but I've see grows with it in Jan and Feb this year as well. Once the spores are in the room and general area it will tend to reoccur. Its best to protect your young plants before it shows and repeat spray every week or two until the third week into flowering. Also spray your mums every two weeks if you have any..... Link to comment Share on other sites More sharing options...
casso Posted July 31, 2006 Share Posted July 31, 2006 Yo Lid. I'd have thought if it was a fungal infection it would have ripped right through your growroom, or ar least onto close neighbouring plants. As it is only the plant closest to the fan, it could be " over transpiration" . As the moved air passes over the leaves, if it is too fierce, it will cause the leaf to over transpire and leave them looking like yours. Just wondering, did this particular plant seem to need watering more than the others? If so then that is more likely to be the problem. Unless of course you can actually see a fungus or mildew on the leaves. Good luck with the finished product, it looks almost ready you lucky boy. Cheers Lid Casso. Link to comment Share on other sites More sharing options...
lisa Posted June 27, 2007 Share Posted June 27, 2007 Its a leaf spot fungus. I've seen this before, its very very infective.For future grows the following protocol has been used and proved effective. The way out is fast growth, ie a lot of light, good air exchange, protection with probiotic bacteria and fungi ie use BioLife. To make up BioLife ignore the instructions, bubble a litre of warm water [35c] for an hour, bring the temp back up to 35c stir in a level tea spoon of black treacle and add a gram of inoculant, leave to bubble overnight. At the same time leave 2 or 3 litres of water to stand overnight to allow chlorine to evaporate, if you can bubble it all the better, mix the two in the morning, spray the plants then water the surplus through the compost. Chuck any excess or use on any other plants you want to inoculate. Final point when spraying only use the sprayer at low pressure, too high a pressure will burst the membrane of larger fungi strains such as tricoderma. Also do not use internal pumps with venturi valve for added aeration, the water being drawn through the impeller again will shred the fungi. Hi OT1 Is this for young plants or can it be used on plants that are a few weeks into flowering? What does "bubble" mean? What equipment do I need to "bubble"? Cheers Link to comment Share on other sites More sharing options...
lisa Posted June 27, 2007 Share Posted June 27, 2007 Cheers pro_libertate I'm past the 2 weeks flowering so I will do this next time I grow. Link to comment Share on other sites More sharing options...
lisa Posted July 1, 2007 Share Posted July 1, 2007 Who manufactures Biolife? Where can I get some from? Cheers lisa Link to comment Share on other sites More sharing options...
taffy Posted July 1, 2007 Share Posted July 1, 2007 (edited) I have tried to find the BioLife and all the rest of those products with no joy at all. If someone could show me where to purchase these products i would be very gratefull! Would a carbon filter on the intake to the grow room stop this? [if it was a virtually sealed room that is]. Peace taffy Edited July 1, 2007 by taffy Link to comment Share on other sites More sharing options...
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