ID help: dirty-looking leaves - Page 2

Scooty · June 26, 2017

Quote:

Originally Posted by soozbz

Thanks for the great info, everyone! The pyrethrin, dish soap and diatomaceous earth combo sounds worth a try. I suspect this might be too big a job for my tiny spray bottle - maybe it's time I invested in an actual garden sprayer!

You might want to consider spinosad too.

Quote:

Originally Posted by oakley

I'm finding with a few of my early issues with fungus gnats and aphids, caught early, but
non the less aggressive, is using a combination of organic treatments that deal with all
the 'life stages' of the ugly predators.
Not one product solved the problem.

The Cannabis growers have so much of that figured out being 'high value' crops.

bt will take care of your fungal gnat larvae, which for me do more damage than the gnats themselves. Once they get to adult stage, there are plenty of things that will kill them.

b54red · June 28, 2017

Quote:

Originally Posted by soozbz

Thanks for the great info, everyone! The pyrethrin, dish soap and diatomaceous earth combo sounds worth a try. I suspect this might be too big a job for my tiny spray bottle - maybe it's time I invested in an actual garden sprayer!

Definitely a good idea.:idea

Bill

soozbz · July 1, 2017

I tried spraying the water/pyrethrin/DE/dish soap combo on Wednesday evening. By now my tomatoes have even more dead leaves than they did before, and I'm a bit worried I might be doing more harm than good. I sprayed my other plants too, and half the leaves fell off my bell pepper plant!

Any idea what could have gone wrong? Maybe I used too much pyrethrin or DE? Or should I have hosed off the plants the following day to remove the residue (which was still there today)? Or is this supposed to happen?

Rockporter · July 14, 2017

Sorry, can't answer your question above soozbz. How are your plants now?

I wanted to let Bill know I made the mix of neem oil, dish soap, bt and de in my gallon sprayer to use yesterday and it worked great. I did have one time that the sprayer seemed to be clogged and I just hit the head on a piece of wood which dislodged the blockage. The plants look very well covered with the de.

zipcode · July 14, 2017

If the soap concentration is too high it will burn the leaves. Usually if that happens it's easy to identify, the leaves will have sunken spots where they kinda dry out.
Also, the badly affected leaves will continue dying even if the mites are gone (and they probably aren't yet).

July 14, 2017	#19
Rockporter Tomatovillian™ Join Date: Feb 2012 Location: Texas Coastal Bend Posts: 3,205	Sorry, can't answer your question above soozbz. How are your plants now? I wanted to let Bill know I made the mix of neem oil, dish soap, bt and de in my gallon sprayer to use yesterday and it worked great. I did have one time that the sprayer seemed to be clogged and I just hit the head on a piece of wood which dislodged the blockage. The plants look very well covered with the de. __________________ In the spring at the end of the day you should smell like dirt ~Margaret Atwood~

July 1, 2017	#18
soozbz Tomatovillian™ Join Date: May 2016 Location: Austin, TX Posts: 12	I tried spraying the water/pyrethrin/DE/dish soap combo on Wednesday evening. By now my tomatoes have even more dead leaves than they did before, and I'm a bit worried I might be doing more harm than good. I sprayed my other plants too, and half the leaves fell off my bell pepper plant! Any idea what could have gone wrong? Maybe I used too much pyrethrin or DE? Or should I have hosed off the plants the following day to remove the residue (which was still there today)? Or is this supposed to happen?

July 14, 2017	#20
zipcode Tomatovillian™ Join Date: Jun 2010 Location: Romania/Germany , z 4-6 Posts: 1,582	If the soap concentration is too high it will burn the leaves. Usually if that happens it's easy to identify, the leaves will have sunken spots where they kinda dry out. Also, the badly affected leaves will continue dying even if the mites are gone (and they probably aren't yet).