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Chesterfield, MO

A few days ago I sprayed with Talstar One and Eagle 40 WP at 1 Tbsp/gal and 1/5 tsp/gal respectively. Now I'm seeing some of the worst chemical burn I've ever had. Half of each leaf is burnt and temperatures just rose into the high 90's.

When mixing insecticides do you have to give each product a gallon of water at the recommended rate or can you mix in each product into one gallon of water at it's recommended rate? In other words - if you wanted 1 gallon of solution, would you mix only half of the recommended rate for each product or could you use the full rate/gallon?

Maybe my application rates are wrong:
Clearys 3336 - 1 tsp/gal
Compass - 1/4 tsp/gal
Eagle 40 WP - 1/5 tsp/gal
Mancozeb DG - 1/2 tsp/gal
Talstar One - 1 Tbsp/gal
Phyton 27 - 1.5 - 2 tsp/gal
Immunox - 2 Tbsp/gal
Triazicide - 1 Tbsp/gal
Hawkeye - 1 Tbsp/gal

Occassionally I will mix 3 or 4 products together. Are there some that can't be combined?

Eveything was going so well until this happened. It's really quite depressing. What can I do to help the plants rebound from the burn??

Thanks in advance!

Steve

7/16/2006 4:24:57 PM

Chesterfield, MO

A couple of clarifications...

I included 1 Tbsp/gal of Hawkeye as a spreader sticker
I sprayed in the evening after the sun was down.
I have not applied any liquid fertilizer yet.
I have a several pumpkins pollinated, the oldest being 12 days.

7/16/2006 4:35:27 PM

Www.extremepumpkinstore.com

Steve,
The most I've ever used per gallon on eagle or talstar was 3 mill

7/16/2006 5:12:17 PM

Tipp City, Ohio

I was told to use 5 Tbsp of Triazicide/gal of water have seen no adverse problems with the leaves at that rate. I only spray after 9:00 pm and normally closer to 10.

7/16/2006 9:20:34 PM

Ontario

sTEVE,

Way to heavy on the Talstar, I use 5ml(1tsp) per gallon. Do you spray at night or did you do it during the day? Should spray at night so it has a chance to dry before the morming.

drew

7/16/2006 10:16:52 PM

Ontario

Also I forgot if your using a spreader/sticker you could lower the dose of insecticide as well. Also 1 tblsp of sticker seems a lot also, I use 5ml of sticker per gallon as well. Better to spray at a low rate more often then one big application.

drew

7/16/2006 10:19:11 PM

Montoursville, PA

Many chemicals including stickers have specific other chemicals with which they may not be mixed with. The labels are pretty clear. Some even instruct us to mix with no other chemical.

My guess is you built a bomb either, by combo mixes, over use or both.

7/16/2006 10:27:31 PM

[email protected]

The rate for Talstar One is very wide & usually forgiving of excess. I personally use .25-.33 oz per gallon but .5 shouldn't have been a problem.

The Eagle 40WP is NOT the same as Eagle 20EW (which is a flowable liquid).

The Eagle 40WP label calls for 4 oz (dry weight) per 100 gallons per acre.

http://www.cdms.net/ldat/ld61L000.pdf

Nova 40WP is the EXACT same thing as Eagle 40WP & is registered for use on cucurbits at 2.5 - 5 oz per acre.

http://www.cdms.net/ldat/ld5UM003.pdf

Like Steve I also have some pouches of Eagle 40WP that I am using up before switching to the 20EW flowable. I do NOT like to estimate the quantity using a teaspoon. Rather I have an (eBay purchased) Ohaus CS200 digital scale.
Here's why:

4 dry oz = 112 grams divided by 100 = 1.12 grams per gallon.

The Hawkeye rate for use with fungicides is .3-.5% v/v or 38-64 oz per 100 gallons. If we split the difference, we arrive at .5 oz or 1 Tbsp per gallon. I have personally used Hawkeye at 4 times this rate (just to see what would happen) on bean & tomato seedlings inside a greenhouse that went to 108°F & no damage occurred.

I'm going to have to wager a guess that something went wrong with the measuring of the Eagle 40WP. 1 gram per gallon is a dicey quantity to estimate in a volumetric measuring device especially if we're trying to guess when that device (spoon?) is one one fifth full. 1/5 of a spoon might also weigh more than 1 gram. I'm not sure.

It is also possible that the night was humid, the plants didn't dry by morning & the daytime temperature rose to the danger zone.

Steve,

Does any of this sound plausible?

7/16/2006 10:30:24 PM

Chesterfield, MO

Thanks for the replies so far

The strange thing is that the day after I sprayed was overcast and in the low 80's. Most of the burn became apparent the next day when it was hot and sunny.

I guess I need to significantly lower my rates and see what happens (although I'm afraid to spray for a while)

Does the volume of water used need to be more when incorporating multiple chemicals?

Most importantly what can be done in the meantime to help the recovery process?

I really appreciate all of the help!

7/17/2006 1:30:38 AM

Chesterfield, MO

Also how do the other rates look to you guys??

7/17/2006 1:31:56 AM

Lake Elmo, Minnesota

Most folks would agree that with Talstar, 1.5 teaspoons would be the low rate when infestation is not terrible and weather is very hot. 3 teaspoons (which is 1 tablespoon) would be the high rate for bad infestation and when temps are low. These are all per gallon of water. As Drew said, best time to spray would be at dusk.

7/17/2006 9:22:41 AM

Little-TON - Colorado

I know we dont have the bugs here in Colorado as you all do back east......we have cuke beetles, I have seen em here. But no SVB's.....yet. However Im a bit miffed on putting on all the "cides" on the gardens and patches. It has to accumlate sometime.... Please read the following article below. It reads about how "we" have been conditioned for the "quick fix" mentality in our society.....but what about all the spiders and bene bugs that we kill....I know at times we need to go to the Dr for some drugs to help us get over a illness....I would rather find another way if possible to over come the problem.....I have always tried to dedicate my fixes on working smarter not harder just because I barely have time to do it once, much less twice. Not that I know that much........It came from my father telling me Id grow up to be good for nothing and never supporting stuff I would do or achieve.... all the time growing up......thats why this article hits so close to home for me........Plants respond....energy put in is energy returned......
To me this is a great read and its food for thought...... growing outside and inside.......

http://www.soilandhealth.org/06clipfile/Soil%2C%20Food%2C%20Health%20and%20Values.htm

Perhaps this is the method needed to grow the next WR??

Grow'em BIG
Gary

7/17/2006 1:30:39 PM

Garden State Pumpkins

Sorry Gary..love the article but had to stop reading it...thought at the end it would be either A. Gore or the Unibomber...neither of whose writings I can tell apart..While I believe there is a compromise to everything, I cannot believe that the worm, introduced to north america by those damn europeans will be the downfall of the earth..I also believe that humanity has the ability to destroy all of humanity, I also believe the cockroach or some sed critter will stay and start us over again..
Easy we grow pumpkins! not all chemicals..not all organic..kill the darn bugs..try and keep the worms..can't we all just get along..LOL

7/17/2006 4:54:21 PM

ENGLAND

"Damn Europeans" ?? What a friendly descriptive.

7/18/2006 6:00:20 AM