Factsheet of the month: January 2015 – Management of clubroot disease in crucifers

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Clubroot is a serious disease of crucifers. It is found in many countries across the world (see the Plantwise distribution map).  It is caused by the fungus Plasmodiophora brassicae, whose spores can live for many years in the soil. This makes the disease difficult to control once a field has been infected.

To find out more about clubroot of crucifers and its management, read this month’s Plantwise Factsheet for Farmers which was written by staff from the Regional Agriculture Research & Development Centre in Sri Lanka. This factsheet is also available in Tamil and Sinhalese.

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Update: Plant Health News (01 Jan 15)

Predation of fruit fly larvae by weaver ants © IITA (CC-BY-NC)

Predation of fruit fly larvae by weaver ants © IITA (CC-BY-NC)

Here’s a taste of some of the latest stories about plant health, including CARDI’s contribution to food and nutrition security over its 40 year history, efforts to protect bananas from TR4 Fusarium wilt and the use of weaver ants as biological control.

Click on the link to read more of the latest plant health news!
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Update: New Pest & Disease Records (24 Dec 14)

Black rot of pineapple has been identified in French Guiana © Anna L. Snowdon

Black rot of pineapple has been identified in French Guiana © Anna L. Snowdon

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 anthracnose of mallow caused by Colletotrichum trifolii in China, the first report of Tomato chlorosis virus (ToCV) in tomato crops in Saudi Arabia and the first report of pineapple black rot caused by Ceratocystis paradoxa on pineapple in French Guiana. 

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Plant virus found in ancient reindeer poo

Virologists that work on detecting new animal and human viruses have successfully extracted two 700-year-old viruses from frozen remains of caribou faeces in the north of Canada.

Reindeer in the snow, BC, Canada

Credit: Bruce McKay (CC BY-SA 2.0 license)

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Update: Plant Health News (17 Dec 14)

Symptoms of cassava witches' broom include a proliferation of leaves at the top of the stem © CIAT (CC BY-NC-SA)

Symptoms of cassava witches’ broom include a proliferation of leaves at the top of the stem © CIAT (CC BY-NC-SA)

Here’s a taste of some of the latest stories about plant health, including small-scale women farmers delivering pioneering efforts in food security in Tanzania, Witches’ Broom Disease affecting cassava in Cambodia and an initiative in Africa which is strengthening food systems while raising awareness of Ebola.

Click on the link to read more of the latest plant health news!
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Update: New Pest & Disease Records (10 Dec 14)

Bacterial leaf streak has been recorded in Uganda for the first time © T.W. Mew, IRRI (CC BY-NC)

Bacterial leaf streak has been recorded in Uganda for the first time © T.W. Mew, IRRI (CC BY-NC)

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 record of Xanthomonas oryzae pv. oryzicola causing bacterial leaf streak of rice in Uganda, the first record of Chickpea chlorotic dwarf virus infecting hot pepper in India and a study on the impact of global warming on insects. 

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One stop shop for information on internationally restricted chemicals

Contributed by Melanie Bateman, CABI Switzerland

mel blogTogether, the three conventions that govern chemicals and hazardous waste safety at the global level (the Basel, Rotterdam and Stockholm Conventions) have launched an online search tool for finding technical and scientific publications to support sound management of chemicals and waste: http://synergies.pops.int/Implementation/Publications/ScientificandTechnicalPublications/tabid/3790/language/en-US/Default.aspx

In particular, the member countries of these Conventions have singled out certain chemicals because of the harm that they can cause to human health and the environment. The online search tool makes it easy to access information on these chemicals, and it brings together information on management and risk reduction across the chemicals’ life cycles. With the click of a button, it is possible to access information on the production, trade, storage, use and safe disposal of these problematic pesticides and other chemicals.

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