Yellow Stripe Rust

Disease

Yellow Stripe Rust

Puccinia striiformis

fungi

In a Nutshell

    The fungus produces tiny, rusty pustules that are arranged in narrow stripes parallel to the leaf veinsThese pustules can sometimes also be found on stems and headsThe reduced leaf area leads to lower productivity, fewer spikes per plant and fewer grains per spikeOverall, the disease can lead to severe crop losses

Hosts: %1$s

· Triticale · Wheat · Rye

Symptoms

The severity of the disease depends on the susceptibility of the plant. In vulnerable varieties, the fungus produces tiny, yellow to orange ("rusty") pustules that are arranged in rows forming narrow stripes parallel to the leaf veins. They eventually merge and can engulf the whole leaf, a feature that appears earlier in young plants. These pustules (0.5 to 1 mm in diameter) can sometimes also be found on stems and heads. At later stages of the disease, long, necrotic, light brown stripes or blotches are visible on leaves, often covered with rusty pustules. In severe infections, the growth of plants is seriously compromised and tissues are damaged. The reduced leaf area leads to lower productivity, fewer spikes per plant and fewer grains per spike. Overall, the disease can lead to severe crop losses.

Trigger

The symptoms are caused by the the fungus Puccinia striiformis, an obligate parasite that requires living plant material to survive. Spores are dispersed up to hundreds of kilometers by wind currents and can initiate seasonal epidemics of the disease. The fungus enters the plant via the stomata and gradually colonizes the leaf tissues. The disease mainly occurs early in the growing season. Favorable conditions for the development of the fungus and the infection are: high altitude, high humidity (dews), rainfall and cool temperatures between 7 and 15°C. Infection tends to cease when temperatures consistently exceed 21-23°C, because at these temperatures the life cycle of the fungus is interrupted. Alternative hosts are wheat, barley and rye.

Biological Control

Many biofungicides are available in the market. Products based on Bacillus pumilus applied at 7 to 14 days intervals are effective against the fungus and are marketed by major actors of the industry.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. Foliar sprays of fungicides belonging to the strobilurin class provide effective protection against the disease when the application is done preventively. In already infected fields, use products belonging to the triazole family or mixes of both products.

Preventive Measures

    Cultivate disease-resistant varieties if availableEnsure adequate nitrogen fertilization, avoid excess nitrogen-useScreen fields regularly for volunteer plants and remove themPlow and dig crop residues deep in the soil after harvest




Features

Regional Weather

Get detailed forecast and actual weather data.

Plantix offers detailed weather information on the following issues:

Precipitation

Humidity

Air Pressure

Temperature

Wind speed

Plantix Community

Get in touch with experts around the world.

Post your questions

You can post your questions and pictures and get feedback from other farmers or gardeners. Plantix' experts will answer your questions related to plant diseases and pests.

MyCommunity

Exchange with Plantix users around you, in your language and related to the crops you grow.

Global Community

Connect to farmers, gardeners, experts and interested people around the world that discuss plant diseases, remedies and best practice for sustainable farming.

AI-Driven Disease Detection

Instant diagnostics and solutions based on your picture

Image Recognition

Plantix analyzes your picture within a few seconds and gives you instant feedback on your plant problem.

Customized Management Options

On top of the detection result, Plantix offers you a detailed description of possible solutions - both biological and conventional.

Preventive measures

Plantix offers information on preventive measures to protect your crop from the next attack.