Alternaria Control

Alternaria Description

Alternaria is caused by species of fungus, Alternaria spp.

Symptoms typically manifest as round, brown lesions with concentric circles and a crack across the middle. Yellow haloing around these lesions is usually visible as well. These spots are usually pretty small at the beginning stage but can grow to be half an inch (or more) in diameter.

As the pathogen progresses, lesions will begin to congregate until necrosis takes over large portions of the leaf. Broccoli and cauliflower heads will begin to show brown rot spots and deteriorate. 

Early applications of a biological fungicide such as Actinovate, active ingredient: Streptomyces lydicus, can help ward off this pathogen as well as other fungi such as Pythium, Botrytis, Fusarium, Ohytopthora, Sclerotinia, Powdery Mildew, Bacterial Spot, and Early Blight as well as Alternaria.

Regalia, Cease, Gaurda, Double Nickel and Mycostop are all products that we offer that include Alternaria control on their labels! 

Please always review product labels prior to purchase to confirm the product you are purchasing is labeled for the specific pest/disease & crop you are treating. Always obtain an accurate diagnosis and ensure you are using good cultural and sanitation practices. Local extension offices will generally be able to identify your pest. Additionally, feel free to send us images and we will do our best to assist you.