Java downy mildew - Peronosclerospora maydis
Effective: May 15, 2020 - December 31, 2020
Taxonomic Position: Sclerosporales : Sclerosporaceae
Pest Type: Fungi
Pest Code (NAPIS): FFABPMD
This pest is a member of the following surveys: Corn
These Approved Methods are appropriate for: 2020
Survey
Approved Method(s)
Method |
Detail |
NAPIS Survey Method |
Visual |
Collect symptomatic plants. Unsprayed, susceptible plants (sentinel plots) that are scouted regularly can be used for early detection. |
3031 - General Visual Observation |
Survey Recommendations
The following are recommendations for executing the survey using the approved methods for pest surveillance. The recommendations are developed through literature review and consultation with subject matter experts.
Signs: Downy (grayish) fungal structures are observed on the chlorotic streaks.
Symptoms: White to yellow stripes/streaks, which become necrotic and brown, are usually the first symptom observed.
When systemic, the pathogen causes severe chlorosis in the upper leaves.
Infected plants may be stunted and sterile and often lodge (fall over).
Plants may develop multiple and deformed cobs, leaflike tassels and cobs, combined tassels and cobs, and either elongated or shortened stalks.