C'est avec surprise que nous avons subit l'épandage par hélicoptère du Foret 48B sur nos habitations dans le Var. Officellement un gentil inoffensif insectiside
pour la lutte contre les chenilles.
Après l'iirritation des voies respiratoires et des problèmes des yeux
ainsi que des maux de têtes sur les membres de ma famille, j'ai rapidement contacté le Pr
Narbonne, une connaissance intéressante toxicoloque (auteur du livre 100 % toxic) afin d'avoir son avis, Il fut surpris que l'on balance ce produit dont on ne connais pas toute la composition
sur les habitations.
Même s'il y a une autorisation du gouvernement, je trouve scandaleux
de larguer cet insecticide sur les habitations.
DISCOURS OFFICIEL : Le produit
utilisé est un insecticide de type biologique, agrée par l'agriculture du même nom, qui présente une innocuité totale sur tous les êtres vivants à l'exception des chenilles.
Il se dégrade en 3 semaines sans effets connus sur l'environnement. Son nom commercial est : FORAY 48B.
L'innocuité du produit n'est pas prouvée du tout, voici les liens :
adjuvants touvés dans le foray 48 B inoffensif officiellement:
Pour information, le Foray 48B est
strictement interdit en Hollande depuis 2001, sachant que sa dernière utilisation en date par épandage fut en 1970) du fait de son extrême toxicité humaine (le bacille utilisé dans cet
insecticide puissant s'installe en effet durablement dans les intestins à la suite de son inhalation (Le Foray 48B reste actif dans l'air pendant 1 semaine constatée après dispersion aérienne)
ou/et ingestion (à la suite de sa déposition volatile aléatoire sur un fruit par exemple) et environnementale (contamination de l'eau). Depuis, en Hollande, une campagne sérieuse d'informations à
l'aide de panneaux suggestifs et clairs, aux endroits concernés empêchent les contacts directs avec cette chenille qui, en l'occurrence, ne fait que passer.
http://www.denhaag.nl/home/bewoners/to/De-bastaardsatijnrups.htm * Il est hélas trop tard pour cette année donc pour informer des riques du Foray 48B puisque l'épandage a eu lieu. Espérons
qu'un peu d'information changera cet état de fait avant que les statistiques ne vous démontrent un jour qu'il faut cesser de considérer l'épandage de Foray 48B comme inoffensif.
FORAY 48 B, en effet, dissimulé derrière
l’étiquette « bio » du bacille de Thuringe effectivement utilisé par les jardiniers bio, se trouve d’autres substances chimiques toxiques pour l’homme, les animaux et la nature,
pour avoir un spectre d'utilisation plus large et lutter contre la mutation des chenilles. Certains médecins et hôpitaux mettent en garde lors de l’utilisation de ce produit puisque des troubles
sanitaires ont été mis en évidence lors de l’épandage de ce produit. Quelques recherches sur ce produit permettent d’affirmer que le plus élémentaire principe de précaution a été
ignoré.
Cette préparation est à base de bacille de Thuringe (même famille que le bacille de l’anthrax et que celui de la gastro-entérite) et est
proposée dans la solution utilisée de façon courante avec 40 autres composés chimiques dont on ne connaît presque rien. Soit environ 95% du produit! Deux au moins sont
particulièrement inquiétants : le 1,2-benzisothiazolin-3-one qui est listé comme immunotoxique et le ethoxylated phenoxy qui se dégrade
en nonylphéol produit qui stimule la croissance des cellules malignes dans le cancer du sein et qui féminise les poissons mâles, d’ailleurs, le Benzisothiazolin, est interdit en Hollande depuis
2001.
Aux Etats-unis, au Canada, Danemark, Hollande et en Nouvelle-Zélande, suite aux plaintes des habitants concernant des symptômes physiques apparus après les pulvérisations aériennes du FORAY 48 B,
une association médicale a prouvé statistiquement la progression des problèmes de santé (environ 40 %) notamment chez les enfants (allergies, asthme, problèmes intestinaux, insomnies, maux de
gorge ou des yeux). En Suisse, la législation interdit de procéder à des opérations de lutte chimique ou biologique de grande envergure en forêt.
Sur l’étiquette américaine du FORAY 48 B (produit vendu par VALENT BIOSCIENCES en France) il est tout de même indiqué "de garder les personnes non protégées hors des secteurs traités jusqu’à ce
que les pulvérisations aient séché".D’autre part les ouvriers qui dispersent la pulvérisation "doivent être équipés de masques particulaires, de filtres et de vêtements de protection et ne
doivent pas séjourner après traitement dans les champs pulvérisés".
L’hôpital de Seattle recommande aux administrés de fermer toutes les ouvertures et de rester enfermés pendant 30 minutes après la pulvérisation. Même chose pour les animaux domestiques. Les
enfants ne doivent pas jouer dehors tant qu’il n’y a pas eu d’humidité sur le produit pulvérisé.
A l'iles de Ré à ecouter interessant :
http://video.voila.fr/video/iLyROoafY_ny.html
ADVERSE HEALTH CONSEQUENCES FOLLOWING AERIAL SPRAYING WITH
BACILLUS THURINGIENSIS (VAR. KURSTAKI) (BTK), TO CONTROL THE GYPSY
MOTH: FLAWS IN GOVERNMENT RISK ASSESSMENTS AND IN PUBLIC HEALTH
OFFICIALS’ ATTITUDES
By R.B. Philp, D.V.M., Ph.D.
Etudes non biasées (en effet selon le journal scientifique lePlos 60 % des études sont biassées par des intérets économiques)
Pas de danger chez l'homme à part cela :
The human health effects of Btk are only one aspect of its effect on the environment. This page attempts to
survey current literature, mostly peer reviewed, to present a balanced picture of problems that could eventually arise when Bt is introduced on a large scale into a populated setting. There are
no long-term studies of health effects to date, so the information presented here allows you to make up your own mind as to whether it is a good idea to spray Bt on humans or not.
We summarize the points made in the literature and remarks below:
-
Bt is the same cellular organism as B. cereus (causes gastroenteritis) and B. anthracis (causes anthrax). The only
difference is in one "organelle" of the cell, called a plasmid, that produces proteins. Each plasmid produces a unique protein that attacks a target life form. In the case of Bt, that life
form is a caterpillar or other insect life forms.
-
Can Bt become anthrax? Theoretically, yes - it could exchange a plasmid with a wild anthrax germ. Also,
it is not easy to tell anthrax, B. cereus, and Bt apart - they look the same and grow in the same environments, and even test the same in some genetic tests. See this Seattle Weekly article for an interesting view.
-
When Bt is sprayed, it can and does infect many people in the target zone, setting up colonies in their
respiratory tract and maybe in their intestines that live for weeks or months. The effects of this are not known. Obvious symptoms do not appear, but what could happen years from now
as a result of these infections is anyone's guess. It is suspected that "symptomless" infections can challenge the immune system and cause disease later (diabetes, multiple sclerosis, and
lupus are some under consideration).
-
There is growing evidence that exposure to inhaled bacterial antigens that generate immune responses in humans (a
potential for allergic reactions) can trigger skin allergic reactons of various types in some individuals. Bt falls into this category. Epidemiological studies have so far almost completely
ignored dermatological symptoms. There are a significant number of anecdotal reports of skin symptoms after sprayings of Bt products in New Zealand (see New Zealand CC-PAM Health Incident Report at this link).
-
The same Bt pesticides that are sprayed on crops produce detectable residues in foods, even processed foods such as
pasta. Gastroenteritis (food poisoning or "stomach flu") can result. It is estimated that a sizeable percentage of such diseases that were previously thought to be caused by B.
cereus are actually caused by Bt insecticides.
-
People with sensitive immune systems could be affected in ways we do not yet know, but immune responses are seen when Bt
infections establish in humans.
-
Closing your house up will not prevent Bt from getting in. Staying indoors for even one day after a spraying will still
expose you to significant amounts of Bt spores.
-
Bt endotoxins may cause unexpected effects; for instance, some insects consuming genetically modified crops that produce
Bt endotoxin actually grow faster. This could because the toxin is actually being used as food, but in experiments the insects had all the preferred food they could eat. An even more probable
reason could be that Bt endotoxin acts as a hormone mimicing substance (this is not the first bacterial toxin to show this behavior). These types of substances (also called endocrine
disrupters) are increasingly suspected of causing serious health problems in humans.
Can Bt live in Humans?
This is an interesting question. There are no absolutely definitive studies addressing this issue, but there is a good
deal of circumstantial evidence that Bt can and does survive and grow in humans:
-
The culture media used to grow Bt in the lab is the same media used to grow other human pathogenic bacteria.
-
The conditions for growth of Bt (pH 7.4, temperature 37oC, moist environment) are found in humans.
-
Humans develop antibodies to the Bt organism.
-
Even four months after a single exposure, Bt organisms of the same strain as the pesticide used in the exposure can be
cultured from nasal swabs. It is unlikely that the original spores would still be present after this period of time.
-
There are a few studies that show Bt canand does cause gastroenteritis in humans and that you can recover culturable Bt
from nursery workers feces, indicating that Bt can live and grow in the intestinal tract.
When humans are infected in this way, the immune system of healthy individuals probably fights off and eventually destroys
the invading cells. However, there are some indications that Bt is able to survive for quite some time at a level that does not cause any overt signs of disease.
Les études se trouvent sur cette page
http://www.nosprayzone.org/pesticides/btk.html#Humans
1)
This study shows that Bt can and does infect humans via inhalation. The infections are asymptomatic in healthy individuals and last at least for a few months.The immune responses noted are a little disturbing because not only will some people develop allergies to Bt, but there is some evidence that
chronic diseases such as Gulf War syndrome, fibromyalgia, MCS, rheumatoid arthritis, and other autoimmune diseases may be partly caused by these "subclinical" infections by organisms heretofore
considered to be harmless.
Immune responses in farm workers after exposure to Bacillus thuringiensis
pesticides
Bernstein IL, Bernstein JA, Miller M, Tierzieva S, Bernstein DI, Lummus Z, Selgrade MK, Doerfler DL, Seligy VL Division of Immunology, Department of Internal Medicine, University
of Cincinnati College of Medicine, Cincinnati, Ohio, USA. bernstil@email.uc.edu
Environ Health Perspect 1999 Jul;107(7):575-82
Although health risks to pesticides containing Bacillus thuringiensis (Bt) have been minimal, the potential allergenicity of these organisms has not been evaluated. Therefore, a health survey
was conducted in farm workers before and after exposure to Bt pesticides. Farm workers who picked vegetables that required Bt pesticide spraying were evaluated before the initial spraying
operation (n = 48) and 1 and 4 months after (n = 32 and 20, respectively). Two groups of low- (n = 44) and medium- (n = 34) exposure workers not directly exposed to Bt spraying were also
assessed. The investigation included questionnaires, nasal/mouth lavages, ventilatory function assessment, and skin tests to indigenous aeroallergens and to a variety of Bt spore and vegetative
preparations. To authenticate exposure to the organism present in the commercial preparation, isolates from lavage specimens were tested for Bt genes by DNA-DNA hybridization. Humoral
immunoglobulin G (IgG) and immunoglobulin E (IgE) antibody responses to spore and vegetative Bt extracts were assayed. There was no evidence of occupationally related respiratory symptoms.
Positive skin-prick tests to several spore extracts were seen chiefly in exposed workers. In particular, there was a significant (p < 0.05) increase in the number of positive skin tests to
spore extracts 1 and 4 months after exposure to Bt spray. The number of positive skin test responses was also significantly higher in high (p < 0.05) than in low- or medium-exposure workers.
The majority of nasal lavage cultures from exposed workers was positive for the commercial Bt organism, as demonstrated by specific molecular genetic probes. Specific IgE antibodies were
present in more high-exposure workers (p < 0.05) than in the low and medium groups. Specific IgG antibodies occurred more in the high (p < 0.05) than in the low-exposure group. Specific
IgG and IgE antibodies to vegetative organisms were present in all groups of workers. Exposure to Bt sprays may lead to allergic skin sensitization and induction of IgE and IgG antibodies, or
both.
Katerine : Liberté (2010)
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