Scientists believe that the control of mosquitoes has
reverted to the same level it was 80 years ago.
Diseases such as Malaria and Yellow Fever carried by the
Mosquito are on the increase. Malaria is transmitted to people by the bite of an
infected Anopholene mosquito, the Vector organism. Only the females bite human
beings as they need a blood meal before laying their eggs. With some 267 million
people infected across 103 countries and deaths of between 1-2 million each year
it is not surprising that the best known of tropical diseases is Malaria.
Imagine the effect it would have if many of the population
was infected by a parasite that caused a debilitating disease. With the
exception of some vector borne diseases, tropical diseases do not cause death on
a mammoth scale. Instead, like MALARIA they result in long term illness
with far reaching economic consequences in medical costs and lost earnings from
commerce and tourism.
Yellow Fever, again transmitted by the Mosquito, is also
increasing and the World Health Organisation estimates there are some
200,000 cases with 30,000 deaths annually.
LIFE CYCLE OF ANOPHELENE AND
LARVEX™ products do not
act as chemicals, they are derivatives of natural vegetable oils known as
"water insoluble surfactants" and are completely non toxic and
biodegradable. They have the property of rapidly spreading on the surface of the
water to give a monomolecular film. Since the Larvex is biodegradable,
considerably more than the minimum is required per hectare.
As LARVEX™ monolayers
do not act by a chemical or biochemical toxic action, but by a physical ‘wetting’
action, this permits the water to enter the hydrophobic breathing passages,
causing oxygen deprivation, asphyxia and drowning. This action is rapid in the
case of pupae that can only obtain the necessary oxygen whilst at the
surface. Larvae however can respire using dissolved oxygen and are less
dependant on obtaining aerial oxygen at the surface.
Another important factor is that since the mechanism of LARVEX™
is physical and not chemical the prospect of the evolution of
resistant mutants is very low indeed.
Anopholenes most affected by monolayers, then Aedes
followed by Culicenes.
As LARVEX monolayers do not act as chemical or
biochemical toxic action, but by a physical ‘wetting’ action, this permits
the water to enter the hydrophobic breathing passages, causing oxygen
deprivation, asphyxia and drowning. This action is rapid in the case of pupae
that can only obtain the necessary oxygen whilst at the surface. Larvae however
can respire using dissolved oxygen and are less dependant on obtaining aerial
oxygen at the surface.
Another important factor is that since the mechanism of LARVEX
physical and not chemical the prospect of the evolution of resistant mutants is
very low indeed.
LARVEX 100 is composed of 100% active monolayer
ingredients. It is recommended for use against Anopholene and Aedes species in
clean water catchments and potable waters (pools, wells, storage tanks,
reservoirs, etc.) and for continuous flow treatments. It is especially effective
against the later stage larvae and pupae, which have a high respiratory oxygen
Anopholenes are most affected by monolayers, then Aedes
followed by Culicenes.
The standard rate of application is 5 litres per hectare. LARVEX
100 should be gently "rained", sprayed or thrown onto the surface
of the catchment but not jetted under the water surface. Larvex SHOULD NOT BE
mixed with water before application, neither should it be stored nor used in
vessels containing any aqueous materials.
Application should be as late in the day as possible, to the
selected catchments around the periphery or along the edges. If the area is
largely inaccessible then the LARVEX may be applied at the accessible
points from where it will spread over the catchment. This can take time but
complete coverage is obtained when further bulk LARVEX refuses to spread,
remaining as visible globules. The indicator "indol" (available from
Accotec) can be used to ensure surface is covered.
A second application, at the same dosage should be made
between 5 and 6 days after the first, and then when 4th stage larvae reappear
(approximately every 3-4 weeks).
LARVEX 100 was previously known as
Di-ethoxy cetostearyl alcohol (10%)
Mono-ethoxy oleic acid (90%)
These are water-insoluble surface-active agents derived from
natural vegetable oils and fats.
The mixture of the two gives an amber coloured liquid at
normal tropical temperatures. Some separation of the solid components may take
place below 15oC but re-dissolves
when the temperature is raised.
HEALTH AND SAFETY DATA
Hazards: Presents no special hazards.
F.P. > 140oF
Storage and Handling
Store under normal, cool warehouse conditions. Handle with
normal skin and eye protection as for surfactants.
This product is approved under The Control of Pesticides Regulations 1986
(U.K.) for use as directed. HSE No. 5393
TEN REASONS FOR USING ACCOTEC PRODUCTS.
1 - DERIVED FROM REPLACEABLE RESOURCES.
2 - COMPLETE BIODEGRADABILITY.
3 - COST EFFECTIVE.
4 - ACTIVE AGAINST INSECTICIDE RESISTANT VARIETIES.
5 - UNLIKELIHOOD OF EMERGENCE OF RESISTANT MUTANTS.
6 - LITTLE EFFECT ON NON-TARGET ORGANISMS.
7 - WIDE SPECTRUM EFFECT ON ALL STAGES OF MOSQUITO
8 - USAGE BY GENERAL PUBLIC, COMMUNITY ACTION.
9 - EASY TO APPLY.
10 - APPLICABLE TO POTABLE
AND IRRIGATION WATERS.