Agricultural and Forestry Science

New Study Finds Evidence That Bse Cases Were Missed

Researchers from Imperial College London have published new results that suggest that over half of BSE cases went unrecognised or unreported during the epidemic in Great Britain. The new figures, to be published in a forthcoming Proceedings B, a learned journal published by the Royal Society, estimate that the total number of cattle infected during the epidemic was over two million.However the paper highlights the need for additional research to reduce the uncertainties in some key biological factors

Pesticide resistance warning after gene discovery

Scientists have raised concerns following the discovery of a single gene that gives vinegar flies resistance to a wide range of pesticides, including the banned DDT.

Scientists are worried as this single mutation unexpectedly provides the fly (Drosophila melanogaster) with resistance to a range of commonly available, but chemically unrelated, pesticides. Significant also, is this species is rarely targeted with pesticides and many of the chemicals it is resistant to, it has never been expo

Researchers eavesdrop on the internal communication system plants use to warn they are under attack

An international team of scientists have today reported the discovery of a protein, called DIR1, that is a key step in the pathways that enable plants to protect themselves against disease. DIR1 is involved in the transmission of a warning signal from plant cells infected by disease. The signal alerts cells, in areas remote from the infected site, that the plant is under attack and switches on defence mechanisms that prevent the disease establishing further infection sites. The report, from scientis

University of Toronto professor finds key protein in fight against plant disease

A University of Toronto botanist has identified a protein that ultimately could provide chemical-free ways to protect crops from disease.

“Finding this protein, called DIR1, could help make it possible to genetically engineer crops that resist disease-causing organisms,” says Robin Cameron, a professor of botany at U of T and the senior investigator of the study, which appears in the Sept. 26 issue of Nature. “In the long run, having a better understanding of the whole process of disease re

Will global warming improve crop production?

Winter temperatures are on the rise and scientists note this change will actually increase a plant’s exposure to freezing temperatures

Scientists from Agriculture and Agri-Food Canada predict crops will be at a greater risk of winter damage in the future even though the climate will be warmer. Perennial forage crops are grown on more than 40% of the cultivated land in Eastern Canada and other regions of North America, where they constitute the backbone of the livestock industry. The

“Black clocks” call time on invasive flatworm

Entomologists in Belfast may finally have found a way of limiting the spread of the New Zealand flatworm, which invaded the British Isles in the 1960s. Speaking at the Royal Entomological Society’s national meeting Entomology 2002, which will take place at Cardiff University on 12–13 September 2002, Dr Archie Murchie of the Department of Agriculture and Rural Development (Northern Ireland) will announce that certain British beetles could help repel the invader by preying on it. Finding a natural pred

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