Preventive sprays and insects go a long way. No russet mites here, or in my country that I have heard. I found one of the most effective applications to fight mites is early lady bugs releases. I like to buy the appropriate amount listed by the lady bug company once about a month in, then again with the onset of flower. I buy the packs with lacewings in them also. A round of praying mantis really helps with cats and larger bugs later in the season. Keep up on neem, BT and spinosad alternating weekly, seems to keep my garden bug free. Healthy plants to start with never hurt anybody either. I would be willing to bet the plants infected had slight deficiencies before the bugs got a hold of the plant.
Do you have any logged information on plant health during the time of infection? Tissue or sap analysis that could hint to where you plants might have let down their guard?
Russet mites seem to be a formidable foe however.
BBxNL
Can't imagine you can get a solid root system like that without also producing hairs. Those things are pretty delicate, and tend to rip free with a little shake.
Shasta County was devistated by the russet this year. Ive never seen so many healthy plants go bad so fast. They seemed to take hold early september, and they rapidly destroyed huge plants. Ive seen whole gardens turn to shit 30 days from harvest.
The tell tail sign seems to be a rusty taco leaf and buds turning dark brown and failing to mature. It starts at the bottom of the branch and progresses upwards, often leaving just the tip of the cola undamaged.
wondering if any other people got hit? I personally lost 30% to the microscopic bastards.
Update
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and a few sativas
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Peace
go to his photo bucket...you'll shit your pants