evu80
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I FRIED ALL the foliage on a previous run because I had sprayed PM control while the light (600w HPS) was on. I thought it was nute burn, learned that mistake, won't make it again. Pest control can be done with lights off. For foliar sprays I turn the lights off spray down the plants, let most of the big beads dry/disperse, then turn the lights back on. I believe the plants will only absorb nutes through the leaves with the lights on.
outwest
I believe the plants will only absorb nutes through the leaves with the lights on.
Awesome. Thanks for the clarification!Burns could happen and I know too. This is why I try the new products before use them on an entire crop.
I use to spry a little part of the plant, and wait 24h to see if something happens. If not, I go with it.
For example, spinosad based product does nothing on plants even if the lights are on. However I prefer to spray just when the lights are off, and the water take more time to evaporate. This allow the compound to enter better in the leaves (if it can) or in the mites war it is useful because high RH helps against mites.
Don't use spinosad for mites, it does not work, at least for me.
The plant can absorb water, nutrients and other things too, no matter if it's day or night. Cells work all day long.
To ensure that something enter in the leave's cells you should keep'em wet at least for half an hour. Without a solvent (water) nothing will enter the plant, day or nightime ;)
typically when spraying for pest control, does it matter if the lights are on and would your answer changes if the wattage of the lights increases? Say T-5 to 600 watts.
I try to spray when the lights are off but given my work schedule its been difficult to get in there right the light goes off .
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