In a recently published study, researchers have identified the natural insect repelling chemical produced by marigold, reinforcing what farmers have culturally used for years as a tool to prevent or reduce whitefly infestations.
This is the second guest post as part of our Climate Smart Agriculture Week (20 – 24 November 2017)
Climate change poses major challenges to small-scale African farmers, whose own locally developed strategies to address these challenges provide entry points to sustainable processes of adapting to climate change. Partners in Prolinnova – a global network for promoting local innovation in ecological agriculture and natural resource management – have studied how crop farmers respond creatively to change.
Some case studies from West and Central Africa provide some insight:
10 years ago the Coconut Rhinoceros beetle (CRB) was first discovered on the western Pacific island of Guam. Since then, these shoe-shine black, miniature invaders have spread to all parts of the island and are laying waste to the local coconut and oil palm population. The economy, culture and ecology of Guam and other Pacific islands are intrinsically linked to the native palm species such that the rhino beetle poses a major threat. The indigenous peoples of Guam have a long history of weaving palm fronds, an artistry that is now at risk due to the rhino beetle. These trees are a symbol of tropic paradise, a motif that drives Guam’s primary industry; tourism. Continue reading
Check out the latest video demo featuring highlights of the new Plantwise Knowledge Bank version 2.1. New translation capabilities and offline content delivery make the knowledge bank a shared resource for even more people in more communities worldwide. Regional pages focus on plant health problems that cross national boarders, and improved search and diagnostic tools bring more specific and appropriate information for users’ needs. Already reaching 198 countries with front-line pest management news, records and recommendations, the Knowledge Bank has become a critical resource for global food security
Tomorrow, the Intergovernmental Panel on Climate Change (IPCC) will release its fifth global warming report predicting indicators of climate change for the coming years. The expectation is that the temperature is set to increase even more dramatically than the last report predicted in 2007, causing a domino effect on weather conditions, oceanic trends and the multitude of ecosystems which are dependent on them. “We believe the assessment of new publications will help us fill up some existing gaps and add to the body of knowledge that already exists in this entire field,” says IPCC Chairman Rajendra K. Pachauri.Often for the public, gaps in understanding of global warming and its predicted effects still remain. Climate change conjures up images of polar bears drifting on icebergs across expanding oceans, or hurricanes spiralling over tropical islands, waves crashing past highway barriers, and entire countries left immersed underwater. But less often do the effects of climate change seem to trickle into the everyday. We know what we can do about it (recycle, bike to work), and how policy-makers have struggled to act on it (curbing temperature increase, agreeing on a unified response) but do we know how global warming and the IPCC predicted scenarios will really affect humanity? Do we know how this will impact the most basic human needs, namely our access to sufficient food and nutrients? Continue reading
A group of scientists at the University of Arizona have this week published a paper in Nature Biotechnology on the evolution of resistance in insect pests populations to insecticidal proteins from Bacillus thuringiensis (Bt) that are produced by transgenic crops. Resistance is defined as the phenotype of an individual that gives the individual the ability to survive on a transgenic insecticidal plant from egg to adult and provide viable offspring. The team analysed field and laboratory data from seventy-seven studies of thirteen pest species in eighteen countries across five continents. Entomologist Bruce Tabashnik and colleagues found well documented cases of field-evolved resistance to Bt crops in five major pests as of 2010. 60% of these cases occurred in the U.S.A, where approximately half of the world’s Bt crop acreage is planted. In some cases, resistance to Bt evolved within as little as two to three years, whilst in other cases Bt crops have remained effective for more than 15 years. The research team aimed to better understand how quickly insect populations are evolving resistance to Bt crops and how this is occurring.
by Keron Bascombe, Technology4Agri
Much of farm enterprise activity is spent dealing with pests and diseases which significantly lower the yield of produce. For many producers this warrants the use of pesticides of many kinds to deter a wide variety of pests and insects that can either destroy crops or act as vectors that cause disease. Excess use of pesticides can not only harm the plant and its soil (or soil medium) but it is potentially harmful to those labourers applying the chemical and in the long run to those consuming the crop.
In this regard, early detection of pests and disease is paramount when operating a medium to large scale agri enterprise, as pesticide application can be minimised if pests are found before they get out of control. There are numerous technologies, ranging from simple applications to complex innovations, that can be used to identify harmful insects and the like. Currently, some of the more high-tech tools are quite expensive, especially for farmers in developing countries. However, as demand and use increases in countries such as the United States, these tools will become more accessible worldwide. Continue reading