Increasing the production of food in an environmentally sustainable way is a major global issue. A report produced by the UK Cabinet Office in 2008 predicted that the global population will rise to 9 billion by 2050 from a current 6.8 billion. This increase in population will substantially increase demand for food, with food production needing to increase by 70% in the next 40 years whilst using the same agricultural footprint and without depleting natural resources. This challenge will require collaboration between universities, research institutes and industry in order to make the considerable advances in technology required to feed a growing population. There is now increasing concern that there are too few specialist graduates in the UK with the expert knowledge and skills required to tackle the issues surrounding global food security.
A new protein discovered in the venom of Australian tarantulas can also kill insect pests that consume the venom orally. The protein known as orally active insecticidal peptide-1 (OAIP-1) was found to be highly toxic to insects that consumed it, with a similar efficacy to the neonicotinoid insecticide imidacloprid. In particular, the protein was found to be highly toxic to the cotton bollworm, Helicoverpa zea.
Many spider species have evolved insecticidal toxins in their venom, which they inject into the prey through their fangs. Consequently it has often been presumed that the venom would not be toxic when ingested orally by insects pests, and therefore would not be suitable for use as an insecticide. Conversely, the scientists in this study discovered it is possible to isolate spider venom peptides with high levels of oral insecticidal activity. The team used the venom from Selenotypus plumipes which is a large tarantula native to Australia which despite its large size is not harmful to humans.
In bees, fear is shown through avoiding dangerous food sites, thereby reducing the pollination of plants at the site. Scientists in this study looked at hornets (Vespa velutina and Vespa tropica) preying on the Asian honeybee (Apis cerana) in China. The hornets hunt bees on flowers and are themselves attacked by bees in defense. The study found that bees actively avoided feeders where predators were and decreased visitation to these risky sites. Bees treated the 4 fold more massive hornet species, Vespa tropica, as more dangerous, and these hornets received 4.6 fold more bee attackers than the smaller hornet species.
This photo was taken in July when data management training and Module 4 training took part in Sri Lanka. Twenty-seven participants took part in the Module 4 training, in which methods for managing and monitoring clinic data collected at plant clinics in Sri Lanka were discussed.
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 a new species of rust fungus from India, the occurrence of Sclerotium rolfsii causing collar rot to Peperomia glabella in Argentina and the first report of the giant stem nematode Ditylenchus gigas from broad bean in Iran.
Click on the links to view the abstracts:
Caribbean banana farmers are abandoning fields where crops have been badly affected by Black Sigatoka disease. Black Sigatoka has badly affected several countries in the region, including Dominica, St. Lucia, Grenada and Guyana. Black Sigatoka is considered the most destructive disease of bananas and plantains and is caused by the fungus Mycosphaerella fijiensis. It first arrived in the Caribbean in 1991, and has since established and spread throughout the region. Severely infected leaves die, significantly reducing fruit yield and causing mixed and premature ripening of banana bunches. As part of the response to Black Sigatoka outbreaks in the Caribbean the Food and Agriculture Organisation of the United Nations (FAO) provided an intensive training programme in management of the disease in Dominica back in June this year. The workshop trained technicians from Dominica, St. Lucia, Grenada, Guyana and St. Vincent and the Grenadines. The Caribbean’s tropical climate with high rainfall and high humidity is conducive to the spread of Black Sigatoka, hence the training program focused on the management of the disease, including the strategic and careful use of fungicides in order to manage the disease while aiming to prevent fungicide resistance developing. Last year, FAO provided an expert from Cuba to assess the management efforts of each country in the Caribbean affected by the disease, and identify areas for improvement. For each country, a management and action plan was created in conjunction with the CARICOM Secretariat, the OECS Secretariat, the Caribbean Agricultural Research & Development Institute (CARDI), Inter-American Institute for Cooperation in Agriculture (IICA), CIRAD, the Ministry of Food Production in Trinidad & Tobago and the Banana Board of Jamaica.