The scientific world is buzzing with the news of a breakthrough discovery that offers a natural solution to protect eucalyptus forest plantations from the devastation caused by a notorious pest, the eucalyptus snout beetle. This beetle is infamous for causing substantial damage to eucalyptus trees, a valuable resource for paper pulp production. Through meticulous research, scientists have now isolated and characterized a naturally occurring pathogenic fungi, marking a giant stride in the development of a biopesticide to control beetle populations.
The Eucalyptus Snout Beetle: An Overview
Also known as Gonipterus platensis, the eucalyptus snout beetle is a leaf-eating pest that greatly defoliates eucalyptus trees. Originally found in Australia, it has spread worldwide, infiltrating countries where eucalypts are grown. The beetle exhibits impressive flight capabilities and can easily hitch a ride with transported forest products, causing damage over vast areas. By feasting on the leaves, buds, and shoots, these pests stunt the growth of the trees, induce deflation, and cause heavy losses.
The Science Behind Using Fungi to Control the Eucalyptus Snout Beetle
Researchers have made significant progress in utilizing fungi to control the eucalyptus snout beetle. They’ve collected fungi from beetles infected naturally in eucalyptus forest plantations and strategically used them to create a bio-pesticide. The highlighted fungi belong to the Beauveria and Metarhizium genres, renowned for infecting and killing insects.
The particularly virulent Beauveria pseudobassiana and Metarhizium brunneum have shown to be highly effective, both upon contact and ingestion, witnessing a 100% mortality rate.
Development of Bio-pesticides
By evaluating specific parameters such as insecticidal activity and UV-B radiation tolerance, researchers ensure that the fungi are suitable for developing bio-insecticides. This marks a significant milestone in finding sustainable solutions for forestry and integrated pest management.
UPSC Civil Services Examination: Previous Year Answers
In the 2013 exam, the correct answer was (b) when asked which organisms are used as biofertilizers. Biofertilizers contain living microorganisms beneficial to agriculture due to their nitrogen fixation, phosphorus solubilization or nutrient mobilization capabilities. These microorganisms include bacteria like Rhizobium, Azospirilium, Azotobacter, Phosphobacteria, and Nostoc. They do not include the edible fungus Agaricus or freshwater green algae, Spirogyra.
In the 2014 exam, the correct answer to the question regarding Lichens initiating ecological succession on bare rock was (b). Lichens are a symbiosis between a fungus and an alga or cyanobacterium and are among the first organisms to colonize barren surfaces.
Last Modified: February 23, 2024