Wednesday , May 25 2022

Research: The biological control of insects protect rainforests –


Although & # 39; often seen as a practical & # 39; risk to the environment, biological control & # 39; invasive species can & # 39; again & # 39; bring the harvest, facilitates the pressure of land and contribute to forest conservation. This paper demonstrates the positive impacts of biological control using cassava mealybugs Phenacoccus Manihot (Hemiptera) as an example. The cassava is a key product for the food, feed and fiber grown on about 4 million hectares in tropical Asia, where the use of & # 39; wasp parasitic lowers the loss of crops, again & # 39 ; bring the profit of the holding and reduce deforestation.

During 2009-2010, the invasive mealybugs caused a reduction of & # 39; 18% yields of cassava Thailand, and led to large increases in cassava prices and urged widespread expansion throughout the region of crop tops & # 39; cassava. This coincided with & # 39; & # 39 increases; 185-608% in the highest & # 39; deforestation rates in neighboring countries. After releasing specific parasitoids for host Anagyrus LOPEZ (Hymenoptera) in 2010, the outbreak of mealybugs cut, the cultivated area has decreased, and the pace of deforestation has decreased by 31-95% in & # 39; individual countries. Therefore, when used according to established guidelines, biological control & # 39; crop pests crops & # 39; can & # 39; avoid the need & # 39; synthetic pesticides, protect tropical biodiversity and deliver long-term environmental benefits on a macro scale.

The insects provide invaluable services to humanity, including the natural control of agricultural pests, service cost at least $ 4.5 billion annually to US agriculture only. The study this week in Biology Communication reveals how insects kill insects that kill harmful organisms – parasitic waspa minutes – help solve the problems of invasive pests, increase yields of crops and protect tropical biodiversity. "The biological control of insects again connects friends and insect visitors, and again & # 39; bring ecological balance in the agri-invaded ecosystems," says Kris Wyckhuys, agroekoloġista at the University & # 39; Queensland (Australia) and IPP CAAS (China), and the study coordinator. "Such approaches based on the nature provide a solution" win-win "to address the mitigation of invasive species, the conservation of biodiversity and profitable farming. The collaboration between conservation biologists and scientists of crop protection may therefore be beneficial to balance the realities of farmers in place with the conservation of biodiversity. "

The study highlights the abundant environmental benefits of biological control of insects, as a desirable alternative to approaches based insecticides to tackle pest problems, supporting sustainable intensification and iskapjar of & # 39; land for conservation. "It is often difficult to reconcile the economic and ecological issues, and small farmers are regularly tempted to resort to chemical pesticides costly and damaging to the environment to control pests. This study confirms that the proper use of biological control can & # 39; resolving economic issues, environmental and ecological at the same time, especially in & # 39; tropical countries, "adds Jean-Philippe Deguine, agroekoloġista and entomoloġista f & # 39; CIRAD and co-author of the paper. By choosing biological control, farmers mitigate pest problems, improve the profitability of their operations and at the same time become stewards of the environment.

Agroekoloġiku Crop Protection, how to preserve biodiversity in the tropics

When used with & # 39; safeguards established, biological control can & # 39; settle b & # 39; permanently invasive species problems. The introduction of scientifically guided & # 39; specialized natural enemies to provide services & # 39; Pest control in & # 39; Crop & # 39; is in accordance with agro-ecological crop protection. As a cost-effective alternative to approaches based pesticides, and rests on the nature services to curb the pests of crops, protection of agro-ecological crop aims to restore and improve -funzjonament ecosystem and help to ensure that the protection of surfaces & # 39; benefit to the pockets of farmers, consumers and producers and agricultural environment.

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