Got out and did my first round of fungicide apps today for lawns infected with NRS. Mixed up a few backpack fulls of 1-2-3 NPP with LI-700 to acidify my water supply. Smelled like I was spraying clove scented weak orange juice on the lawns It was actually a little refreshing, rather than the usual 2-4D ester stink I usually suck in.
NPP is a good product, but it takes more than spraying it to keep diseases at bay. Like I mentioned in another thread, don't apply high N fert in the summer. I would switch over to a more organic based fert that encourages soil microbial activity rather than a quick N release (if you don't do so already). IMO, a more holistic approach may be the better solution rather than applying a fungicide.
Question not meant for me, but I use to use a Stihl SR420 (mister) with this material. I mixed on the fly as the NPP will sink to the bottom of the tank.
With this material, water isn't an issue as this material is mostly meant for disease suppression, but the stuff I had didn't have curative and preventative rates. I know Bill used to say you could use it for grub control as well, then you would definitely need more water.
Ya the NPP directions state to mix 2-3 ozs (depending on if preventative or curative) of product with one gallon water to cover 1k sq ft. Backpacking is suited well for this (for smaller lawns).
It smells good but I don't think it works. I tried it on a small section under a tree that had powdery mildew (I think because ther was excess nitrogen from some miraclegro soil added that was lefetover). Didn't do a thing.
I have a few sections that had some smut disease, did not do a thing. I ended up using a more traditional fungicide which worked fine. I'm not trying to put the stuff down but so far it does smell good but has been worthless imo.
It smells good but I don't think it works. I tried it on a small section under a tree that had powdery mildew (I think because ther was excess nitrogen from some miraclegro soil added that was lefetover). Didn't do a thing.
I have a few sections that had some smut disease, did not do a thing. I ended up using a more traditional fungicide which worked fine. I'm not trying to put the stuff down but so far it does smell good but has been worthless imo.
Put down 2nd app of NPP on lawns infected with NRS. Did so at the curative hi rate, as some of the familiar 'frog eyeing' was just starting to peek through. I freaked and did the 2nd app of the product soon thereafter, thoroughly dousing the worst areas with NPP mix.
Went back to one of those lawns today (week after app), and the frog eyes were much less noticeable.
Really, my booty is on the line using NPP, milorganite, hi mowing, and aeration to combat NRS. If this doesn't work for me and my customers, I won't be feeling real great about it. So far, some promise but the jury is still out until we get through July.
Did you forget to read this part? using NPP, milorganite, hi mowing, and aeration to combat NRS
He is addressing the problem by using cultural practices in addition to treating the fungus directly. There are no silver bullets here, it's all part of a program. Proper irrigation should also be included with in the program.
Cultural control practices are targeted
to minimize the effects of necrotic ring
spot infection. Management practices
that promote deep rooting during spring
and fall will help reduce the extent of
necrotic ring spot symptom expression.
Also, the effects of infection will be
reduced with practices that relieve
summer stresses associated with
compaction, drought, and nitrogen
deficiency. These include implementing
a balanced nitrogen fertilizer program
(preferably with slow-release sources
of N), re-directing traffic where feasible, and judicious use of
irrigation.
Although there are differences of opinion, most researchers
favor deep, infrequent irrigation as part of a program to reduce
the effects of summer stress on infected turf. http://www.extension.purdue.edu/extmedia/BP/BP-116-W.pdf
Barry - irrigation is one thing my customers do not do beyond what falls from the sky. Isn't any way I could get them to water systematically and correctly all summer long. Wish I could, but nope.
So, how does a good watering program serve to minimize the impacts of NRS? What moisture level (or lack thereof) does NRS seem to thrive in?
Water deeply and infrequently but make sure to avoid any drought stress. Try seeding with perennial rye too as it's immune to NRS. I always overseed with nearly a 50/50 blend just for this reason, plus the PR germinates so much quicker than KBG.
Barry - irrigation is one thing my customers do not do beyond what falls from the sky. Isn't any way I could get them to water systematically and correctly all summer long. Wish I could, but nope.
So, how does a good watering program serve to minimize the impacts of NRS? What moisture level (or lack thereof) does NRS seem to thrive in?
I don't think the NPP works. I'm not knocking it or trying to diss anybody, but I have not seen it do squat on anything I have applied it to. The tea on the other hand I think is quite nice.
It thrives in prolonged wet conditions, think rotting.
If you can't control all the environmental variables to prevent it, well
Spraying preventative and curative apps of chitin for NRS is like wiping with sand paper, yeah it feels like your doing something butt at the end of the day
what was gained.
It thrives in prolonged wet conditions, think rotting.
If you can't control all the environmental variables to prevent it, well
Spraying preventative and curative apps of chitin for NRS is like wiping with sand paper, yeah it feels like your doing something butt at the end of the day
what was gained.
I don't think the NPP works. I'm not knocking it or trying to diss anybody, but I have not seen it do squat on anything I have applied it to. The tea on the other hand I think is quite nice.
Don't know about him, but I used LI-700 to adjust my pH down. Did not take a pH test but did follow the label on the acidifier and the resulting solution with the 1-2-3 NPP had truly a weak orange juice smell to it, which I figure put me in the right ballpark pH wise.
So... does the stuff work better with excessive moisture?
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