anglais espagnol

Sur la gauche ci-dessous, vous trouverez un article de CPNN et sur la droite la discussion qui s'y rapporte. Vous êtes invité à lire et à discuter en cliquant sur l'une des questions listées ici, ou, si vous le souhaitez, poser une nouvelle question. Prenez le temps de cocher l'un des boutons ci-dessous en choisissant le niveau de priorité qui doit être donné à cet article.

par domain d'action par région par catégorie par date

Les Nations Unis et la Culture de Paix Le Mouvement Mondial pour une Culture de Paix Valeurs, Attitudes, Actions

CPNN Reglements Envoyer un Rapport Devenez un Reporter de CPNN

	Tiny Shrimp May Reduce Need for Mosquito Pesticides un article par Tony Dominski In response to the rapid spread of West Nile virus in the United States, there has been has been widespread application of mosquito-killing pesticides. These are toxic to human beings and natural ecosystems. Fortunately, alternative non-toxic mosquito control agents are now under development. These include fish, bats, bacteria, and tiny shrimp known as copepods. University of Florida researchers have shown that copepods can reduce West Nile mosquito populations by eating mosquito larvae in old tires and other water-holding containers [see Internet article]. Copepods were also used successfully in Vietnam to control the mosquitoes which carry dengue fever. The Vietnamese dengue mosquitoes were breeding in water storage containers near people’s homes. Pesticide control has not been very effective due to late reporting of epidemics and rapid return of mosquitoes after spraying. Therefore, public health workers in Thuongtin district, Hatay province, worked with school children and community organizations to seed drinking water containers with mosquito-eating copepods and clean up discarded water containers. As described in an internet article, this two-fold program in Vietnam succeeded in eliminating dengue fever in 32 of 37 communes and drastically reducing it in the other five. Surrounding communes which had not been treated continued to have high dengue fever infection rates. In 2004 Viet Nam reported 73,300 cases of dengue fever infections, including 101 fatalities. The annual cost of the Vietnamese copepod and container cleanup program was $2 per person, including administrative costs. But the post-program expansion was estimated to cost less than $0.20 per person. Another similar successful program in Rangoon and Burma involved seeding voracious dragonfly larvae into domestic water storage containers. These inspiring examples raise the possibility that eco-friendly bio-control of mosquitoes could be implemented worldwide and at an affordable price.		DISCUSSION Question(s) liée(s) à cet article: Does your town use bio-control of mosquitoes?, * * * * * Commentaire le plus récent: Readers' comments are invited on this article and discussion question.
Cet article a été mis en ligne le July 30, 2005.