HOME

PRODUCTS

TECHNICAL ASSISTANCE

WHO WE ARE

CONTACT US

  INSECTS RESISTANCE TO CHEMICAL INSECTICIDES.

      When you detect an insect plague in an area and apply an insecticide, it is hardly achieved the extermination of all the insects in a single application and some of them manage to survive the treatment. This does not mean that these insects are different from those of their species, but they have a defense mechanism that differentiate them - the resistance to this insecticide.

    The resistance has been described as the diminished response of an animal or vegetal species population to a pesticide or to an enemy agent, as a consequence of its application. This is to say that there is not enough only using one class of insecticide to eliminate a plague when that insecticide is used continually.

All the insects have a defense mechanism that creates resistance.

     The insects have a natural mechanisms that genetically transfere to their offsprings the ability to resist to a chemical insecticide or similar, as long as it does not contain the same action form. This is called crossed resistance. But when a plague has several defense mechanisms, managing to resist to several types of pesticides at the same time, of different classes or action forms this is called multiple resistance.

    Since the middle of the fifties there was a spreading of the use of the multiple action insecticide and it has been noticed the appearance of resistance. In 1966 the WHO informed about approximately 180 plague classes resisting to one or more pesticides and in only two years the number rose up to 228 and the increase continues. Nowadays people experiment with some mosquito species, applying outdated insecticides for the mentioned species, a few years later. The results could not be more discouraging, with only one or two treatments the mosquitoes created resistance. The conclusion is: once the insect has developed resistance to a particular insecticide, there is no way that the insecticide results  effective against this species.

     This is why when an insecticide does not produce the desired effect humans usually increase the dose and the time between applications, without observing the written contraindications. Consequently, this damages the environment and the humans, but it also strengthens the insects multidrug resistance. We should not forget another consequence, which is money inverted in nothing, not taking into account the cost of developing new and effective products. There is also a decrease in the insect plagues control during some seasons, until finding the appropiate insecticide.

Many respiratory diseases occur for the insecticides incorrect use.

     In order to stop producing more damage to nature and to humans, the best thing to do would be to carry out a plague control with several simultaneous methods of extermination, methods of the less harmful to the environment and more effective with these plagues and thus achieving a cost reduction.

If you want to read our other articles about the flies, mosquitoes and wasps exterminators as well as some curiosities about these flying insects,

click below.