July 12, 2015 Leave a comment
March 13, 2015 Leave a comment
“Approximately 300 farmer-self help groups from Machakos County and its environs under the Katoloni community-based organization have registered improved crop yields in the last one year due to high levels of sensitization on crop pest and diseases at plant clinics in the region,” writes Maugo Owiti of HiviSasa.com.
In the article, Pius Ndaka, a farmer from Iluvya village shares the benefits he has experienced from the Katoloni plant clinic.
April 4, 2014 Leave a comment
Last week, the Borlaug Summit on Wheat for Food Security took place in Mexico, bringing together thought leaders, policymakers, and leading agricultural research-for-development organizations to discuss the role of wheat in the future of food security. Wheat is an extremely important crop that provides around 20% of the world’s calories but this staple crop is threatened in some areas by a fungal disease called stem rust.
March 20, 2014 Leave a comment
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 a ‘Candidatus Phytoplasma Ziziphi’- related strain associated with peach decline disease in India, molecular and morphological characterisation of Scutellonema bradys from yam in Costa Rica and the first report of apple collar rot incited by Sclerotium rolfsii in Tunisia.
July 9, 2013 Leave a comment
BBSRC (Biotechnology and Biological Sciences Research Council) and Syngenta funded scientists at the University of York and University of Durham have discovered a gene called AmGSTF1 that plays a key role in controlling multiple herbicide resistance in black-grass (Alopecurus myosuroides) and annual rye-grass (Lolium rigidum). Now the gene that confers resistance has been identified, it is hoped that chemicals that inhibit the gene may be able to be used in future to make herbicides effective against resistant weeds.
Black-grass and rye-grass are widespread weeds which cause problems in cereal and oilseed rape farming. Management using herbicides is becoming increasingly difficult since both black-grass and rye-grass can acquire a single defence mechanism that confers resistance to multiple herbicides- known as multiple herbicide resistance. The genetics of multiple herbicide resistance have been poorly understood until recently, however scientists have now discovered that a gene producing an enzyme called glutathione transferase (GST) is responsible for multiple herbicide resistance. Scientists created transgenic thale cress (Arabidopsis thaliana) plants with the GST producing gene inserted which were resistant. GSTs are known to detoxify herbicides, but project leader Professor Rob Edwards of the Centre for Novel Agricultural Products at the University of York believes that the gene they discovered works as a kind of ‘master switch’ that activates a range of protective mechanisms in the plant. When resistant plants with the GST gene are sprayed with GST inhibiting chemicals, they become susceptible to herbicides. This demonstrates the potential for using GST inhibiting compounds in future herbicide formulations to manage resistant rye-grass and black-grass. These weeds are currently very difficult to manage due to their widespread herbicide resistance.
May 7, 2013 Leave a comment
Vegetable farmers in the Kayunga and Mukono districts of Uganda are reporting crop losses due to black rot disease. One farmer, Twaha Kahooza of Kyampisi village, Kayunga Sub-county, says he had planted four acres of cabbages and was expecting about Shs18m (about £4,500 or US$7,000) from the harvest, however he only managed to get Shs5m (about £1,200 or US$2,000).
Black rot is caused by the bacterium Xanthomonas campestris pv. campestris and is one of the most destructive diseases of cabbage and other crucifers such as broccoli, brussels sprouts, Chinese cabbage, collards, kohlrabi and mustard. The disease is usually most prevalent in low lying areas where plants remain wet for long periods. The disease is characterized by a yellow V-shaped lesion at the leaf margin which turns brown as the leaf area expands. The disease can also affect seedlings and can enter the plant through insect feeding or injury to the plant. Management of black rot in crucifers includes obtaining certified, pathogen free seed, ensuring there is enough space between plants and crop rotation.To read more about black rot and black rot management visit factsheets on the Plantwise Knowledge Bank.
To read a Plantwise Factsheet for Farmers written in Uganda click here.
To find out more about Plantwise plant clinics running in Uganda, click here