Wheat production in Pakistan – Producción de trigo en México

Infected wheat by P. striiformis/Trigo infectado por P. striiformis (Z. Kang)
Infected wheat by P. striiformis/Trigo infectado por P. striiformis (Z. Kang)

Pakistan

According to Reuters (source provided by ProMED-mail), farmers from districts southeast of Islamabad in Punjab province have seen their crops affected by unusual weather this year. First affected by hailstorm and now by heavy rain and cold weather, wheat fields of the region have been damaged severely. Some farmers have lost up to 70 % of their fields and are still waiting to harvest their crops three weeks behind schedule. Experts said that delays in harvesting and damaged plants can increase the chances of attack by yellow rust also called stripe rust (Puccinia striiformis). The fungal disease causes yellow leaf stripes, loss of vigour and stunting of plants.

Extension officers can review factsheets provided by Plantwise such as the Green and Yellow list written in Zambia* and the Plantwise technical factsheet on yellow rust to create a new and country-specific extension message for Pakistan on how to prevent and manage the disease.

*Please note that the pesticides mentioned in this factsheets are specific to Zambia and before giving recommendations check against your national registered pesticide lists.

México

Según El Diario (fuente proporcionada por ProMED-mail), la producción de trigo en la región de Nuevo Casas Grandes (Chihuahua) se ve afectada por la roya amarilla (causada por el hongo Puccinia striiformis) cual ocasionará una disminución del rendimiento. La roya amarilla es una enfermedad muy agresiva en condiciones favorables para su desarrollo (agua libre, temperatura de 10-15 °C y viento) y cuando se usó variedades susceptibles. Es la enfermedad que produce mayores pérdidas en el cultivo del trigo debido a su gran capacidad de dispersión a largas distancias. Se identifica por la formación des estrías estrechas en las hojas, pérdida de vigor y retraso en el crecimiento de las plantas.

Los extensionistas pueden revisar las hojas informativas de Plantwise como la Lista Verde y Amarilla elaborada en Zambia* y la hoja técnica de Plantwise sobre la roya amarilla para crear material nuevo y específico para México sobre cómo prevenir y manejar la enfermedad.

*Por favor, tenga en cuenta que las pesticidas indicadas en la hoja informativa son específicas para Zambia y antes de dar recomendaciones verificar la lista de pesticidas registradas en su país.

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Yellow Rust Adds to Famine Worries

Source: allafrica.com

In terms of food security the big story recently is that two regions of southern Somalia are in the midst of a famine. More than 10 million people are currently at risk of starvation with 1.8 million people displaced in East Africa’s worst drought for 60 years. Ethiopia and Kenya are neighbouring food insecure populations according to the UN food security classification.

However East Africa may soon experience more food shortages in the future due to yellow rust. Yellow rust (Puccinia striiformis) is a fungal disease which reduces wheat yields and can be found in many countries (Where is yellow rust found?). It causes the formation of necrotic areas and yellow pustules which together form stripes on the leaves. In the past it has not been found to destroy entire crops and was managed by the introduction of yellow rust resistant varieties in the 1970s. Recently a more aggressive strain of yellow rust has appeared and has already affected parts of Europe, Australia and the US. It is able to generate more spores than previous strains and spread more rapidly.

The international community had largely ignored this new strain in its fight against another wheat disease. Ug99 is a strain of stem rust (Puccinia graminis) which was first detected in 1998 and is traditionally regarded as more of a threat than yellow rust in the areas that it exists in (Where is stem rust found?). However this new strain of yellow rust is now considered more of a threat to wheat yields.

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