I have white fly infestation and need to deal with this. I found your article on white fly control very informative and believe that you have an answer.
We live in Tucson, Arizona and our grape vines get hit every year. The grape vines are on trellises around the house at about 9'-0 above ground. Total plan area is approx 1600 sq feet (150' x 6' on the north side – 50' x 12' on the east side and 6' x 15' on the south side). Access for spraying from below and above is no problem.
Best for us is to use chemicals with a hose spray dispenser unit. So subject to your confirmation that I have followed your advice correctly, we want to order from you:
1 – Hose spray nozzle – with fine spray adjustment. I could not be sure which of your cheaper spray units would deliver the fine spray that you reccomend in your article.
1 – Permethrin or Bifen unit – sufficient quantities to repeat spraying 3 times this year? Is this sufficient for the year, in case of another attack on vines or other plants.
1 – Spreader Sticker unit – sufficient to match Permethrin/Bifen quantity above.
1 – Nylar unit – sufficient to match Permethrin/Bifen quantity above.
Any further advice that you can think of will be appreciated and once again, thank you for a very informative article on white fly control.
On hearing back from you, we will place the order – can you advise on shipping cost and timing?
A.H. – Arizona
Thank you so much for your comments on our information. We have in fact spent a lot of time finding out just what products work on this pest and at this point, the actives you're listing (from our article) are as good as it gets. I'll attempt to answer your questions below but it might be easier if you call for further clarification as trying to cover everything in e-mail is sometimes tough but I will try.
1) It's hard for me to judge how many gallons you'll use each application but based on the square footage, I'm thinking 2-3. This will factor in when it comes to chemical use along with the sprayer you use. And since you indicated you'd like a hose end sprayer, the two best suited units would be either of these:
Hose End Sprayer: http://www.bugspray.com/item/quart_dial-a-mix_sprayer.html
I prefer the following unit:
Professional Hose End http://www.bugspray.com/item/gilmour_professional_hose_end_sprayer.html
2) Since you're treating grape vines, you should stick with an active that's okay for fruit crops. This would be the Veg Plus Permethrin:
Vegetables Plus Permethrin: http://www.bugspray.com/catalog/products/page1260.html
Plan on using 4-6 oz per application (it mixes at the rate of 2 oz per gallon of water). As indicated above, you'll be using some 2-3 gallons per treatment. And though you're thinking you'll only need to treat 3 times per year; if the problem is persistent it could easily turn into 5-8 treatments so take this into consideration. Our concentrates won't go bad for at least 5 years so if you get the large size, it will keep fine.
3) Get an equal size of Spreader Sticker to match the Permethrin. So if you get the quart of Veg Plus, get a quart of SPREADER STICKER and use it at the rate of 2 oz per gallon as well.
4) Get the pint of NYLAR. This will be used at the rate of 1 oz per gallon of water.
If you get the Professional Hose End listed above, it can be set at 10 tablespoons per gallon which is the max setting. This would be the rate you'll need (2 oz of perm, 2 oz of Spreader Sticker and 1 oz of Nylar equals 5 oz per gallon which is 10 tablespoons per gallon). I'd add enough for two gallons per treatment and try to use up everything you add to the sprayer. When done spraying, be sure to rinse it out well so it won't clog when stored away. I like to use it with nothing but clear water when I'm done doing an application to get it good and clean through and through.
Lastly, when you add all the above listed items to your shopping cart the shipping will be calculated before you check out so you'll see exactly what it will cost.
I hope this helps! Good luck with you treatments and remember we're just a toll free call away if you have any questions.
Here are direct links to the information and products listed above:
White Fly Control: http://www.bugspray.com/article/whiteflies.html
Hose End Sprayers: http://www.gotosprayer.com/sprayers/hose-end-sprayers
Spreader Sticker: http://www.bugspray.com/item/spreader_sticker.html