General Information
Information on chemical plant protectants for disease control on greenhouse vegetables must be used in the context of a "Total Disease Control Program." For example, many diseases are controlled by sanitation (no smoking, fumigating soil, using disease-free seed and seedlings, removing all dead plant parts, and washing hands and equipment before moving from one house to another), use of resistant varieties, crop rotation, seed treatment, exclusion of aphids from fall crops, and cultural practices. Always use top-quality seed or plants obtained from reliable sources. Seed are ordinarily treated by the seed producer for the control of seed decay and damping-off. However, tomato seed also should be treated with Clorox to reduce the risk of tobacco mosaic virus and certain bacterial diseases.
Most foliar diseases can be reduced or controlled by maintaining relative humidity under 90%, by keeping the air circulating in the house, and watering in such a manner to avoid wetting leaves.
Spraying with fungicides should be done as to ensure coverage of all plant surfaces. We recommend the use of high-pressure and high-volume equipment or subliming products (Exotherm Termil). Application should start prior to or as soon as the disease first appears and continued on a 7- to 14-day schedule as needed. Before starting the spray schedule, be sure to obtain a diagnosis of the disease in order to use the proper material. This information may be obtained through your local N.C. Cooperative Extension center.
CAUTION: The risk of pesticide exposure in the greenhouse is high; use protective clothing laundered daily or after each exposure; ventilate house during application and use appropriate respirator. Always use the chemical as directed on the label.
Chemical Control
Disease | Product | FRAC | Crop | Rate | PHI | REI |
---|---|---|---|---|---|---|
Alternaria leaf spot | copper, fixed (various) | M1 | Basil | See label | See label | See label |
cyprodinil + fludioxinil (Switch) | 9 + 12 | Basil | 11 to 14 oz/A | 7 | 12h | |
Cucurbits (post-transplant) | 11 to 14 oz/A | 1 | 12h | |||
Lettuce | 11 to 14 oz/A | 0 | 12h | |||
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h | |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Cucurbits (post-transplant) | 8 to 10 oz/A | 3 | 12h | |
fludioxonil (Spirato GHN) | 12 | Basil | 5.5 to 7 fl oz/A | 7 | 12h | |
mancozeb (various) | M3 | Cucurbits | See label | See label | See label | |
mancozeb + zoxamide (Gavel) | M3 + 22 | Cucurbits (post-transplant) | 1.4 to 2 lb/A | 5 | 48h | |
penthiopyrad (Fontelis) | 7 | Cucurbits (post-transplant) | 0.375 to 0.5 fl oz/gal per 1,360 sq ft | 1 | 12h | |
Lettuce | 14 to 24 fl oz/A | 3 | 12h | |||
potassium bicarbonate (Milstop) | NC | Lettuce | 1.25 to 5 lb/A | 0 | 1h | |
triflumizole (Procure) | 3 | Lettuce | 6 to 8 fl oz/A | 0 | 12h | |
Angular leaf spot | copper, fixed (various) | M1 | Cucurbits | See label | See label | See label |
Anthracnose | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato | 8 fl oz/A | 0 | 12h |
copper, fixed (various) | M1 | Tomato | See label | See label | See label | |
Basil | See label | See label | See label | |||
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h | |
Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |||
famoxadone + cymoxanil (Tanos) | 11 + 27 | Cucurbits (post-transplant) | 8 to 10 oz/A | 3 | 12h | |
Tomato | See label | 3 | 12h | |||
mancozeb (various) | M3 | Cucurbits | See label | See label | See label | |
Lettuce | See label | See label | See label | |||
Tomato | See label | See label | See label | |||
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Tomato | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |
polyoxin D zinc salt (Affirm) | 19 | Eggplant | 6.2 oz/A | 0 | 4h | |
Pepper | 6.2 oz/A | 0 | 4h | |||
Tomato | See label | 0 | 4h | |||
potassium bicarbonate (Milstop) | NC | Lettuce | 1.25 to 5 lb/A | 0 | 1h | |
zinc dimethyl-dithio-carbamate (Ziram) | M3 | Tomato | 3 to 4 lb/A | 7 | 48h | |
Bacterial canker | famoxadone + cymoxanil (Tanos) | 11 + 27 | Tomato (post-transplant) | See label | 3 | 12h |
Bacterial speck and spot | copper, fixed (various) | M1 | Tomato (post-transplant) | See label | See label | See label |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Tomato (post-transplant) | See label | 3 | 12h | |
mancozeb (various) | M3 | Tomato (post-transplant) | See label | See label | See label | |
Basal rot | cyprodinil + fludioxinil (Switch) | 9 + 12 | Lettuce | 11 to 14 oz/A | 0 | 12h |
Black mold | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
Botrytis | copper, fixed (various) | M1 | Basil | See label | See label | See label |
(Botrytis blight/gray mold) | cyprodinil + fludioxinil (Switch) | 9 + 12 | Basil | 11 to 14 oz/A | 7 | 12h |
Lettuce | 11 to 14 oz/A | 0 | 12h | |||
Tomato (post-transplant) | 11 to 14 oz/A | 3 | 12h | |||
dicloran (Botran) | 14 | Lettuce | See label | 14 | 12h | |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
fenhexamid (Decree) | 17 | Cucurbits | 1.5 lb/A or 1-1.5 lb/A if tank mixed | 0 | 12h | |
Eggplant | 1.5 lb/A or 1-1.5 lb/A if tank mixed | See label | 12h | |||
Lettuce | See label | 3 | 12h | |||
Pepper | 1.5 lb/A or 1-1.5 lb/A if tank mixed | See label | 12h | |||
Tomato (post-transplant) | See label | 0 | 12h | |||
fludioxonil (Spirato GHN) | 12 | Basil | 5.5 to 7 fl oz/A | 7 | 12h | |
penthiopyrad (Fontelis) | 7 | Cucurbits (post-transplant) | 0.375 to 0.5 fl oz/gal per 1,360 sq ft | 1 | 12h | |
Lettuce | 14 to 24 fl oz/A | 3 | 12h | |||
Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 4h | |||
polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h | |
Eggplant | 6.2 oz/A | 0 | 4h | |||
Pepper | 6.2 oz/A | 0 | 4h | |||
Tomato (post-transplant) | See label | 0 | 12h | |||
potassium bicarbonate (Milstop) | NC | Lettuce | 1.25 to 5 lb/A | 0 | 12h | |
pyraclostrobin + boscalid (Pageant Intrinsic) | 7 + 11 | Tomato (post-transplant) | 23 oz/A | 0 | 12h | |
pyrimethanil (Scala) | 9 | Tomato (post-transplant) | 7 fl oz/A | 1 | See label | |
Cercospora leaf spot | difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h |
mancozeb (various) | M3 | Cucurbits | See label | See label | See label | |
mancozeb + zoxamide (Gavel) | M3 + 22 | Cucurbits (post-transplant) | 1.4 to 2 lb/A | 5 | 48h | |
penthiopyrad (Fontelis) | 7 | Lettuce | 14 to 24 fl oz/A | 3 | 12h | |
potassium bicarbonate (Milstop) | NC | Lettuce | 1.25 to 5 lb/A | 0 | 1h | |
Corynespora leaf spot | polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h |
Downy mildew | copper, fixed (various) | M1 | Cucurbits | See label | See label | See label |
cyazofamid (Ranman) | 21 | Basil | 2.75 to 3 fl oz/A | 0 | 12h | |
cymoxanil (Curzate) | 27 | Cucurbits (post-transplant) | 3.2 to 5 oz/A | 3 | 12h | |
Lettuce | See label | See label | 12h | |||
famoxadone + cymoxanil (Tanos) | 11 + 27 | Cucurbits (post-transplant) | 8 to 10 oz/A | 3 | 12h | |
Lettuce | 8 to 10 oz/A | 1 | 12h | |||
mancozeb (various) | M3 | Cucurbits | See label | See label | See label | |
Lettuce | See label | See label | See label | |||
mancozeb + zoxamide (Gavel) | M3 + 22 | Cucurbits (post-transplant) | 1.4 to 2 lb/A | 5 | 48h | |
mandipropamid (Micora) | 40 | Basil | 8 fl oz/A | 1 | 4h | |
Cucurbits | 8 fl oz/A | 0 | 4h | |||
Lettuce | See label | See label | 4h | |||
phosphorus acid (various) | 33 | Basil | See label | See label | See label | |
potassium phosphite (various) | 33 | Basil | See label | See label | See label | |
Drop rot | dicloran (Botran) | 14 | Lettuce | See label | 14 | 12h |
Early blight (Alternaria sp.) | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h |
copper, fixed (various) | M1 | Tomato (post-transplant) | See label | See label | See label | |
cyprodinil + fludioxinil (Switch) | 9 + 12 | Tomato (post-transplant) | 11 to 14 oz/A | 3 | 12h | |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Tomato (post-transplant) | See label | 3 | 12h | |
mancozeb (various) | M3 | Tomato (post-transplant) | See label | See label | See label | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |
polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h | |
Eggplant | 6.2 oz/A | 0 | 4h | |||
Pepper | 6.2 oz/A | 0 | 4h | |||
Tomato (post-transplant) | See label | 0 | 4h | |||
pyrimethanil (Scala) | 9 | Tomato (post-transplant) | 7 fl oz/A | 1 | 12h | |
zinc dimethyl-dithio-carbamate (Ziram) | M3 | Tomato (post-transplant) | 3 to 4 lb/A | 7 | 48h | |
Fusarium blight | cyprodinil + fludioxinil (Switch) | 9 + 12 | Basil | 11 to 14 oz/A | 7 | 12h |
Gray leaf mold | copper, fixed (various) | M1 | Tomato (post-transplant) | See label | See label | See label |
cyprodinil + fludioxinil (Switch) | 9 + 12 | Tomato (post-transplant) | 11 to 14 oz/A | 3 | 12h | |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
Gray leaf spot | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
mancozeb (various) | M3 | Tomato (post-transplant) | See label | See label | See label | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |
Gummy stem blight | cyprodinil + fludioxinil (Switch) | 9 + 12 | Cucurbits (post-transplant) | 11 to 14 oz/A | 1 | 12h |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h | |
mancozeb (various) | M3 | Cucurbits | See label | See label | See label | |
penthiopyrad (Fontelis) | 7 | Cucurbits (post-transplant) | 0.375 to 0.5 fl oz/gal per 1,360 sq ft | 1 | 12h | |
polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h | |
Late blight | copper, fixed (various) | M1 | Tomato (post-transplant) | See label | See label | See label |
cyazofamid (Ranman) | 21 | Tomato (post-transplant) | See label | 0 | 12h | |
cymoxanil (Curzate) | 27 | Tomato (post-transplant) | 3.2 to 5 oz/A | 3 | 12h | |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Tomato (post-transplant) | See label | 3 | 12h | |
mancozeb (various) | M3 | Tomato (post-transplant) | See label | See label | See label | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
Phytophthora blight | cyazofamid (Ranman) | 21 | Tomato (post-transplant) | See label | 0 | 12h |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Cucurbits (post-transplant) | 8 to 10 oz/A | 3 | 12h | |
mancozeb + zoxamide (Gavel) | M3 + 22 | Cucurbits (post-transplant) | 1.4 to 2 lb/A | 5 | 48h | |
phosphorus acid (various) | 33 | Tomato (post-transplant) | See label | See label | See label | |
propamocarb hydrochloride (Previcur Flex) | 28 | Cucurbits | See label | 2 | 12h | |
Lettuce | See label | 2 | 12h | |||
Tomato (post-transplant) | See label | 5 | 12h | |||
Powdery mildew | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h |
cyprodinil + fludioxinil (Switch) | 9 + 12 | Cucurbits (post-transplant) | 11 to 14 oz/A | 1 | 12h | |
Lettuce | 11 to 14 oz/A | 0 | 12h | |||
Tomato (post-transplant) | 11 to 14 oz/A | 3 | 12h | |||
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h | |
Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |||
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Cucurbits (post-transplant) | 0.375 to 0.5 fl oz/gal per 1,360 sq ft | 1 | 12h | |
Lettuce | 14 to 24 fl oz/A | 3 | 4h | |||
Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |||
polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h | |
Eggplant | 6.2 oz/A | 0 | 4h | |||
Pepper | 6.2 oz/A | 0 | 4h | |||
Tomato (post-transplant) | See label | 0 | 4h | |||
potassium bicarbonate (Milstop) | NC | Cucurbits (post-transplant) | 1.25 to 5 lb/100 gal | 0 | 1h | |
Lettuce | 1.25 to 5 lb/A | 0 | 1h | |||
sulfur (various) | M2 | Lettuce | See label | See label | See label | |
Tomato (post-transplant) | See label | See label | See label | |||
triflumizole (Procure) | 3 | Lettuce | 6 to 8 fl oz/A | 0 | 12h | |
Pythium root rot | phosphorus acid (various) | 33 | Basil | See label | See label | See label |
propamocarb hydrochloride (Previcur Flex) | 28 | Cucurbits | See label | 2 | 12h | |
Lettuce | See label | 2 | 12h | |||
Tomato (post-transplant) | See label | 5 | 12h | |||
Rhizoctonia root rot | phosphorus acid (various) | 33 | Basil | See label | See label | See label |
Scab | mancozeb (various) | M3 | Cucurbits | See label | See label | See label |
polyoxin D zinc salt (Affirm) | 19 | Cucurbits | See label | 0 | 4h | |
Sclerotinia rot | cyprodinil + fludioxinil (Switch) | 9 + 12 | Lettuce | 11 to 14 oz/A | 0 | 12h |
dicloran (Botran) | 14 | Lettuce | See label | 14 | 12h | |
penthiopyrad (Fontelis) | 7 | Cucurbits (post-transplant) | 0.375 to 0.5 fl oz/gal per 1,360 sq ft | 1 | 12h | |
Septoria leaf spot | difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Cucurbits (post-transplant) | 16 to 20 fl oz/A | 7 | 12h |
Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |||
cyprodinil + fludioxinil (Switch) | 9 + 12 | Lettuce | 11 to 14 oz/A | 0 | 12h | |
penthiopyrad (Fontelis) | 7 | Lettuce | 14 to 24 fl oz/A | 3 | 12h | |
azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h | |
copper, fixed (various) | M1 | Tomato (post-transplant) | See label | See label | See label | |
famoxadone + cymoxanil (Tanos) | 11 + 27 | Tomato (post-transplant) | See label | 3 | 12h | |
mancozeb (various) | M3 | Tomato (post-transplant) | See label | See label | See label | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |
zinc dimethyl-dithio-carbamate (Ziram) | M3 | Tomato (post-transplant) | 3 to 4 lb/A | 7 | 48h | |
Target spot | azoxystrobin + difenoconazole (Quadris Top) | 11 + 9 | Tomato (post-transplant) | 8 fl oz/A | 0 | 12h |
difenoconazole + cyprodinil (Inspire Super) | 3 + 9 | Tomato (post-transplant) | 16 to 20 fl oz/A | 0 | 12h | |
mandipropamid + difenoconazole (Revus Top) | 3 + 40 | Tomato (post-transplant) | 5.5 to 7 fl oz/A | 1 | 12h | |
penthiopyrad (Fontelis) | 7 | Tomato (post-transplant) | 0.5 to 0.75 fl oz/gal per 1,360 sq ft | 0 | 12h | |
Tomato (post-transplant) | See label | 0 | 12h | |||
Watery soft rot | dicloran (Botran) | 14 | Lettuce | See label | 14 | 12h |
White rust | famoxadone + cymoxanil (Tanos) | 11 + 27 | Lettuce | 8 to 10 oz/A | 1 | 12h |
Other Links
For assistance with a specific problem, contact your local N.C. Cooperative Extension center.
Note on Recommendations
Recommendations of specific chemicals are based upon information on the manufacturer's label and performance in a limited number of trials. Because environmental conditions and methods of application by growers may vary widely, performance of the chemical will not always conform to the safety and pest control standards indicated by experimental data. All recommendations for pesticide use were legal at the time of publication, but the status of registration and use patterns are subject to change by actions of state and federal regulatory agencies.
Acknowledgements
Previous versions of this factsheet were prepared by Michelle Henson, Charles Averre, S. F. Jenkins, and Paul B. Shoemaker.
Publication date: Dec. 6, 2017
Revised: Aug. 2, 2023
The use of brand names in this publication does not imply endorsement by NC State University or N.C. A&T State University of the products or services named nor discrimination against similar products or services not mentioned.
Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by NC State University or N.C. A&T State University nor discrimination against similar products or services not mentioned. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. For assistance, contact your local N.C. Cooperative Extension county center.
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