Maher Dichlorvos (50% EC)
Mechanism of action:
Dichlorvos is a non-systemic and penetrating insecticide with contact, digestive and respiratory effects, and severe impact which has a short protective period. This composition has a high teratogenic effect, but because of its long lasting and little residue on the product, has a weaker effect on the mites than the insects. This toxin inhibits cholinesterase enzyme in the nervous system of the animals. Acetylcholine acts as a neurotransmitter in the inter-synaptic space and stimulates the next axon. Dichlorvos in the insect's body causes accumulation of acetylcholine in the synapse, and as a consequence, the subsequent stimulation of the neural string carries on continuously, due to the fact that the cholinesterase enzyme necessary for the decomposition of acetylcholine in the inter-synaptic space, and the elimination of this continuous stimulation is blocked through dichlorvos.
Despite its non-systemic nature, dichlorvos has a high efficiency on sucking insects. Due to the high vapor pressure (0.012 mm Hg at 20 oC), the remaining poison is eliminated within three days and can be used for early and greenhouse products. As this compound decomposes in water after a certain time, it should be used as soon as possible and keep it stored not for more than 24 hours. Dichlorvos is used against sucking insects, larvae of butterflies, cockroaches (rodents) and flies (in the cultivation of fungi) on a variety of plants.
Compatibility and Mixing:
The use of dichlorvos in the recommended dose does not pose a risk to the plants, with the exception of the grass, rose, chrysanthemum, and cucumber, which should be carefully sprayed, since they may be sensitive in certain conditions. The mixing of dichlorvos with alkaline compounds and chinomethionate (morestan) and polysulfides should be avoided.