Update: Plant Health News (16 Jul 14)

wheat leaf showing chlorotic spots symptomatic of boron toxicity © CIMMYT (CC BY-NC-SA)

Wheat leaf showing chlorotic spots symptomatic of boron toxicity © CIMMYT (CC BY-NC-SA)

Here’s a taste of some of the latest stories about plant health, including the varying effects of rain on crops in Ivory Coast, the discovery of wheat genes that control boron tolerance and the projects managed by FAO that aim to improve food security in Africa.

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Update: New Pest & Disease Records (9 Jul 14)

orange rust

Orange rust (Puccinia kuehnii), which has been found for the first time on sugarcane in Ecuador. Copyright: Robert C. Magarey

We’ve selected a few of the latest new geographic, host and species records for plant pests and diseases from CAB Abstracts. Records this fortnight include new rusts on sugarcane in Ecuador and Southern Africa, outbreaks of the whitefly Aleurothrixus aepim in Brazil, and the first report of the fungus Alternaria arborescens causing leaf spot on rice in Pakistan.

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Maize lethal necrosis has spread to Rwanda

Maize lethal necrosis disease symptoms

Maize lethal necrosis disease symptoms. Credit: Rob Reeder © CABI

Report by Abigail Rumsey, Beatrice Uwumukiza and Bellancila Uzayisenga.

In the past two years, we have reported on the presence of the maize lethal necrosis (MLN) disease in East African countries including Kenya, Tanzania and Uganda. The disease is also present in South Sudan. The most recent report has been of its spread to the Northern Province of Rwanda. Read more of this post

Update: Plant Health News (02 Jul 14)

The European Food Safety Authority have announced their opinion on biotech oilseed rape © Carron Brown (CC BY- NC)

The European Food Safety Authority have given their verdict on biotech oilseed rape © Carron Brown (CC BY- NC)

Here’s a taste of some of the latest stories about plant health, including the release of EFSA’s scientific opinion on biotech oilseed rape, why using too much fertilizer is bad for crops and bad for climate and how the El Niño is already impacting Peruvian fruit crops.

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Factsheet of the month: July – Maize Lethal Necrosis Disease

20137804184-page-0On Friday, the International Plant Protection Convention (IPPC) released an official pest report, submitted by KEPHIS, for the presence of Maize lethal necrosis disease (MLND) in Kenya. This disease is caused by a co-infection of Maize Chlorotic Mottle Virus and another cereal potyvirus, such as Sugarcane Mosaic Virus, Wheat Streak Mosaic Virus or Maize Dwarf Mosaic Virus. This co-infection causes more severe symptoms that either of the viruses causes alone. Symptoms include mottling, stunting, necrosis and malformed ears.

MLND can devastate maize crops, impacting farmers’ incomes and the food security of the area. To find out how to recognise and control MLND, read the Plantwise Factsheet for Farmers created by employees from the Ministry of Agriculture and CABI.

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Update: New Pest & Disease Records (25 Jun 14)

Phomopsis blight of eggplant has been identified in Egypt © David B. Langston, University of Georgia (CC BY)

Phomopsis blight of eggplant has been identified in Egypt © David B. Langston, University of Georgia (CC BY)

We’ve selected a few of the latest new geographic, host and species records for plant pests and diseases from CAB Abstracts. Records this fortnight include the first report of bacterial leaf blight of jute caused by Xanthomonas campestris pv. capsularii in India, the molecular characterization of a novel victorivirus from the entomopathogenic fungus Beauveria bassiana and the first report of phomopsis blight of eggplants in Egypt. 

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Update: Plant Health News (18 Jun 14)

Increased awareness of side-effects has reduced post-harvest chemical use on Citrus © Rachel Jones (CC BY-NC)

Increased awareness of side-effects has reduced post-harvest chemical use on Citrus © Rachel Jones (CC BY-NC)

Here’s a taste of some of the latest stories about plant health, including chemical-free citrus post-harvest becoming the new standard, how weeds could help feed billions in a warming world and the rehabilitation of banana fields devastated by Xanthomonas wilt in DRC.

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Update: New Pest & Disease Records (11 Jun 14)

Fusarium oxysporum f. sp. cubense tropical race 4, associated with Panama wilt, has been identified outside Southeast Asia © Scot Nelson (CC BY-SA)

Fusarium oxysporum f. sp. cubense TR4, has been identified outside Southeast Asia © Scot Nelson (CC BY-SA)

We’ve selected a few of the latest new geographic, host and species records for plant pests and diseases from CAB Abstracts. Records this fortnight include Phytophthora cinnamomi in the rhizosphere of agricultural crops in southern Bahia (Brazil),  the first report of Fusarium oxysporum f. sp. cubense tropical race 4 associated with Panama disease of banana outside Southeast Asia and the first report of ‘Candidatus Liberibacter asiaticus’ associated with Huanglongbing on Persian lime in Martinique and Guadeloupe.

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Update: Plant Health News (04 Jun 14)

Scientists have identified a gene that encodes resistance to Phytophthora capsici, a fungus-like pathogen spreading root rot disease in peppers © Gerald Holmes (CC BY-NC).

Scientists have identified a gene that encodes resistance to the fungus like-pathogen causing root rot disease in peppers © Gerald Holmes (CC BY-NC).

Here’s a taste of some of the latest stories about plant health, including the discovery of a microbe that could help control rice blast, concern over the effects of erratic rainfall on crops in Somalia and the discovery of a gene encoding resistance to stem and fruit rot of pepper.

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Factsheet of the month: June – Wild Oat Weed in Wheat

Wheat is one of the most important crops grown around the world. Its high protein content compared to other cereals  means it is a key component in the diets of  many. It is also easy to cultivate, versatile and contains a range of vitamins and minerals.

Although pest resistant varieties of wheat have been developed, there are still numerous pests that can affect the yield of wheat, such as weeds. Wild oat is an example of one of these weeds. Wild oat resembles wheat so it often goes unnoticed until the wheat crop is already being affected. For information about how to identify wild oat in your wheat field, and how to manage this weed, please read the ‘Wild Oat Weed in Wheat’ factsheet, written by staff at the Plant Protection and Quarantine Department of Afghanistan’s Ministry of Agriculture. Please note this factsheet is also available in Dari.

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