Fungicides for Commercial Cucurbit Production

Fungicides registered for commercial use on cucurbit crops (cucumbers, melons, winter squash, summer squash, etc.) in Utah, organized by mode of action (MoA).

Primary Active Ingredient	Brand Name	MoA	Residual Days	Gummy Stem Blight	Pythium Root + Fruit Rot	Powdery Mildew
thiophanate-methyl	Omni T-Methyl 4.5 F, Nufarm T-Methyl 70 WSB, Omni T-Methyl 70 Wp, Ovon 4.5, Ovon 70WSB, Talaris 4.5 F, Tesoro 4.5 F	1	10-14	x		x
myclobutanil	Rally 40W	3	14			x
tebuconazole	Willowood Teb 3.6SC	3	7-14	x		x
azoxystrobin	Aframe, Quadris, Tycoon	11	7-14	x		x
fludioxonil	Emblem	12	7-10	x		x
fluazinam	Vantana	29	5-7	x
allyl isothiocyanate	Dominus	8F	N/A		x
Bacillus amyloliquefaciens strain D747^O	Double Nickel 55, Triathlon BA	BM2	7	x		x
Bacillus pumilis strain QST 2808^O	Sonata	BM2	7			x
Bacillus subtilis strain IAB/BS03^O	Aviv, Milagrum Plus	BM2	5-7	x	x	x
Bacillus subtilis strain QST 713^O	Rhapsody, Serenade ASO	BM2	5-7	x	x	x
	Serenade MAX, Cease			x		x
	Serenade Opti WP					x
	Serenade Soil				x
Clonostachys rosea strain J1446^O	Lalstop G46 WG	BM2	5-7		x	x
Trichoderma gamsii^O	Bio-Tam 2.0, Obtego, Tenet WP	BM2	N/A		x
Trichoderma harzianum Rifai strain T-22^O	RootShield Granules, RootShield Plus Granules, RootShield Plus WP	BM2	N/A		x
copper hydroxide	Champ WG, Kocide 3000 Kocide 3000-O	M1	7	x
copper oxychloride	Badge SC	M1	7	x
chlorothalonil	Bravo Zn, Drexel Chlorothalonil 720, Echo 720 A, Initiate Zn, Omni Chlorothalonil 720 SC, , Quadris Opti, Zing!	M5	7-14	x
hydrogen peroxide^O	Jet-Ag, OxiPhos	NC	7			x
	OxiDate 2.0, ZeroTol 2.0			x		x
	Jet-Ag 5%				x	x
	OxiDate 5.0			x	x	x
potassium bicarbonate^O	Kaligreen	NC	5-7			x
potassium salts of fatty acid^O	Kopa Insecticidal Soap	NC	5-7			x
extract of Reynoutria sachalinensis^O	Regalia CG, Regalia	P5	7-10	x	x	x
mono- and dipotassium salts of phosphorous acid^O	Rampart, Reliant	P7	7-21	x		x
cyflufenamid^O	Torino	U6	7-10			x
sodium tetraborohydrate decahydrate	Prev-AM, Prev-AM ULTRA	UN	10-14			x
sulfur^O	Acoidal, Crusade DF, SulfOMEX, Sulfur DF	UN	7-10			x
paraffinic oil^O	JMS Stylet-Oil	UN	3	x		x
mineral oil^O	Ultra-Pure Oil	UN	3			x

Note: All products listed in this table are registered trademarks. The list is not all-inclusive, but provides examples of products that are registered for commercial use in Utah. Always review the product label for the specific crop you are treating, targeted pests, safety information, and preharvest intervals. All product information was sourced in 2023 from the TELUS Agronomy Label Database.
^O = Organic Active Ingredient