my fungicide chart for northern wisconsin

[wood1954]

this is what ive been using for a couple years now.

Fungicide	frac code	PHI	dose	Phomopsis	Black Rot	Downy Mildew	Powdery Mildew	Botrytis	Bitter	Anthrac
April-July 4th
Mancozeb	MO3	66	1 Tbls/gal, 2 oz/4 gals	++++	+++	+++	+	0​	++	+++
Sulfur	MO2	0	2 tbls/gal, 4oz/4 gals	0​	0​	0​	+++	0​	0​	?
Captan	MO4	0	2 tbls/gal, 4oz/4 gals	++++	+	+++	0​	+	++	++
tebuconazole use after flowering	3	14	3 oz/4 gals	+	+++/+	0​	+++	+++/+	--	--
July 5th- frost
myclobutanil	3	14	1 tbsp/4 gals	0​	+++	0​	+++	0​	0​	+++
tebuconazole	3	14	3 oz/4 gals	+	+++/+	0​	+++	+++/+	--	--
Heritage	11	14	1oz/4 gals	xxx			xxx			xxx
Captan	MO4	0	2 tbls/gal, 4oz/4 gals	++++	+	+++	0​	+	++	++
phostrol	P07	0	1oz/gal			xxx				xxx
Bacilli d747	BM02	0	.5 oz/ gallon			xxx	xxx	xxx		xxx
lime sulfur		n/a	12 oz/gallon	xxx	xxx	xxx	xxx	xxx	xxx	xxx
bifenthrin insecticide		21	.5 oz per gallon
thuricide BT		0
Malathion		3
pyrethrin		1

 

[ChuckD]

All at the same time? Do you rotate chemicals to prevent resistance? Spray schedule? I didn’t spray last year but need to be ready this year and have so many questions.

 

[wood1954]

All the chemicals can be tank mixed effectively, just have to keep it mixed well. The frac codes are how I rotate, depending on rain I spray every ten days or so. Usually spray when the shoots are a couple inches, then before flowering. Immediately after flowering, then every ten days are so. This year I’m out of sulfur and have a lot of tebuconazole so I’ll use that instead of sulfur. In the chart , the more Xs mean the fungicide is more effective. Also remember to keep spraying after harvest. I’m pretty confident that the dosing is the least amount needed to be effective.

 

[wood1954]

https://www.canr.msu.edu/news/early...ee to four weeks after bloom through harvest.This is a great resource for spraying fungicide, it’s from Michigan so similar climate. Has description of the disease and what and when to spray.