3 Steps For Effective Disease Management

Q & A with Nufarm Expert Dave Etzler.

Q: What steps should growers take to prevent diseases from destroying their bottom line?

A: Growers should take three simple steps to keep their plants disease free: monitor, apply fungicides as needed and keep detailed records.

We recommend that growers consistently check plant material for disease symptoms — weekly during the winter, and twice weekly during the spring and summer.

Growers must choose the proper fungicide for the disease. For the best results, we suggest you rotate chemistries with different modes of action. Fungicides should also be applied as a preventive treatment before diseases occur.

Growers must choose the proper fungicide for the disease. For the best results, we suggest you rotate chemistries with different modes of action. Fungicides should also be applied as a preventive treatment before diseases occur.

Diseases To Look Out For In The Greenhouse

Q: Which common diseases should growers be on the lookout for in the greenhouse?

A: Growers should lookout for a variety of root and crown rots: Botrytis, Pythium spp., Phytophthora spp., Rhizoctonia spp. and Thielaviopsis. Root rots can be caused by high moisture in the potting media. If the potting media is poorly drained, diseases are likely to sprout. Root damage can also be caused by over fertilization, high salt levels in the potting media and cold temperatures.

Pythium spp. and Phytophthora spp. control options:
Adorn®: foliar: 2-4 oz/100 gal, drench: 1-4 oz/100 gal
Alude™: foliar: 26-54 oz/100 gal, drench: 5-10 oz/100 gal

Botrytis, Rhizoctonia spp. and Thielaviopsis control options:
3336®: drench: 8-16 oz/100 gal
Affirm™: foliar: 0.25-0.5 lb/100 gal
Emblem™: drench: 1-2 oz/100 gal

Growers should also inspect for fungal leaf spots:
Anthracnose, Cephalosporium, Cercospora, Fusarium,
and Phyllosticta leaf spot control options:
3336®: foliar: 12-16 oz/100 gal
Affirm™: foliar: 0.25-0.5 lb/100 gal
Emblem™: foliar: 1-2 oz/100 gal