Kratki tekstic koji su iz Hippy seed kompanije objavili na Facebooku:
looking for something, found an letter explaining why jiffy's go green
Mold on Soil...
until the fungus sporelates we don't really know what type of it is, a good deal of fungus mycelium (think of it as fungal roots) grows out white. However, the two most common types of fungal contaminates you'll get from using Jiffy Pellets or Peat Pots is going to be trichoderma (forest green mold/ "the mean green") or cobweb mold (I forget the latin name).
Cobweb mold is responsive to a direct shot of 3% H2O2 (not diluted) however trichoderma will take that peroxide with stride and spit in your face for the effort. You'll know which is which within a day or two when it begins to spore. The cobweb will start to turn grayish while the trichoderma gets it's namesake green spores on top of it.
Both of them can be responsible for damping off disease if not contained because, as they grow through the soil, the mycelium completely consolidates control over the soil and literally drowns out the roots by preventing oxygen from reaching the roots. Both plant roots & fungus require oxygen to survive, however both seedlings and fungus spores favor elevated CO2 levels during incubation. In other words, you can't make a condition ideal for one without doing the same for the other.
The best advice, as digdirt suggested would be to increase the fresh-air exchange in your greenhouse dramatically. Don't use the "mini-greenhouse" covers and keep some kind of fan blowing on your pots and you'll go a long way to preventing these two molds from settling in on your plants.
As for temperatures, however, both trichoderma and cobweb mold thrive in temps between 45-98(F) so it's not so much "moist and warm" conditions, it's just moist. Randomly, many "snow-molds" - which infects lawns - have ideal incubation temperatures of 20-40(F).
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To prevent the problem in the future, you can avoid peat based soils and switch to coco-coir (technically a more renewable resource anyways) instead. Some of the hydroponic stores sell coco-coir that comes pre-infected (by design) with specific strains of trichoderma which are designed to ward off more aggressive contaminate molds but they, themselves have a shortened lifespan and don't have the strength to consolidate control over the entire substrate (soil).
Either way, peat or coco-coir, the safest bet - although a hassle if you haven't got the equipment - is to steam pasteurize the soil before planting. All contaminate molds are mesophilic and cannot survive tempertures past the 130+ (F) mark so placing the soil into a steam bath where the internal temperature of the soil reaches 140-160(F) and stays there for about 45-60 minutes will kill off all harmful microbes while leaving the beneficial, thermophilic, microbes intact.
Tema: Uzgoj Bhut Jolokia i ostalih chilli papricica (Posjeta: 431934 vremena)