Dichlorvos, organophosphate - DDVP

 Dichlorvos is an organophosphate (OP) insecticide widely used in
developing countries. Because of its high acute toxicity and the consequent
dangers to workers, there are concerns whether safe use is possible under such
conditions.



    It is effective against mushroom flies, aphids, spider mites, caterpillars, thrips, and whiteflies in greenhouse, outdoor fruit, and vegetable crops. It is also used in the milling and grain handling industries and to treat a variety of parasitic worm infections in dogs, livestock, and humans. It is fed to livestock to control bot fly larvae in the manure. It acts against insects as both a contact and a stomach poison. It is available as an aerosol and soluble concentrate. It is also used in pet collars and "no-pest strips" as pesticide-impregnated plastic. In this form it has recently been labeled for use against bed bugs

Abstract

In this study, in order to elucidate the toxic nuclear effects of
dichlorvos, freshly isolated human peripheral blood lymphocytes were
incubated with 5, 10, 20, 40, 80 and 100 microg/mL of dichlorvos.
According to the results, dichlorvos induced micronuclei, decreased the
mitotic and replication indexes. It is a genotoxic product causing
chromosomal damage (an increase in micronucleus) and cell death
(decrease in mitotic and replication indexes).

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Chronic toxicity
Reproductive effects
The HSE review found: "No fertility studies which are both adequately conducted and reported... Individually no study is considered adequate to assess the teratogenic potential of dichlorvos in any species". In spite of these data gaps, government ministers ruled that: "Overall the weight of evidence indicates that dichlorvos does not present a risk to fertility and reproduction in humans.

Genotoxicity
There is evidence that dichlorvos is mutagenic in bacteria, fungi, and mammalian cells in vitro, but that there is no evidence for mutagenicity in whole animals, when it is rapidly degraded.

Environmental effects
   Dichlorvos is toxic to fish and aquatic arthropods are more sensitive than fish. It is highly toxic to birds and to honey bees.

   However, by applying an arbitrary safety factor of 100 to the toxic dose for the most sensitive species, the Water Research Centre has recommended an annual average level of 0.001 µg/l (parts per billion) for freshwater species, and 0.04 µg/l for marine life in saline waters.


 Food residues
Because dichlorvos degrades fairly rapidly it is not generally found as a residue on food. The UK Working Party on Pesticide Residues monitors residues in food, and dichlorvos is rarely found if at all.

How to Determine If You Have Bed Bugs

There are three main signs that suggest you have a bed bug infestation. Most adults are only the size of an apple seed, meaning these small pests can be very difficult to detect. In many areas, they have become a pronounced problem in recent years, but this also leads to many cases of paranoia where there is no issue. Don't assume that any bite-like bump is a sign of bed bugs. If you suspect a problem in your home, stay calm and keep in mind that, while they are an awful nuisance, there has never been a report of the bites transmitting diseases or infections to humans, and the side effects of a bite are usually minimal to non-existent.

Usually the first indicator of an infestation is the appearance of one or more small red bumps on the skin. Bed bugs usually bite at night, sucking blood from exposed skin, especially the face, neck, arms and hands. The bite is usually not felt, only seen sometime afterwards. Bites are usually painless, small, flat, or slightly raised bumps on the skin. Redness, swelling, and itching commonly occur with the bump(s).

Another important point to keep in mind if you find a small bump on yourself or your children is that, at this time, no doctors or professionals have the ability to definitively say that the bump was caused by a bite. The only way to say with certainty that there is an infestation in your home is to find a sample of an actual bug, dead or alive, which can be examined by a pest management specialist.

There are some strong indicators of bed bugs that you should look for if you suspect an infestation. Since they are small and very difficult to find, the following represents a few more readily apparent signs. Keep in mind that the best inspection is one completed by a professional, so, if possible, contact a local pest management expert with experience in bed bug control.

1. Fecal Spotting

Removing all of the sheets and lifting up your mattress, look along the edges of your box spring and mattress piping for accumulations of feces. From a distance, you may be able to see a slight accumulation of dark specks that look like small pieces of black dirt on or inside the fabric. Fecal spottings may also be found on the wooden inside of a box spring, or on the head board, but these are harder to differentiate since they may appear to be part of the wood grain.

2. Shed Skin

Bed bugs also shed their skin, often in fairly large, intact, pieces. If areas of fecal spotting are identified, then look for shed skin in the same area. If you find any of these sheddings near fecal spottings, they are usually a translucent brown colour, you may be able to see under closer inspection that they look like the empty shell of a bug. If you look close enough around suspected fecal spotting, then full shed skin should be able to be found. If you find fecal spotting or shed skin, contact a pest control expert as soon as possible.

3. Recurring Bites

The first two cases represent reliable evidence that a pest control expert can work with to identify the problem conclusively, however, this is not always possible. Some bed bugs bite more than others, and some people are more sensitive to the bites, so recurring bites may be the best indication that you, as an untrained inspector, can find. If you find two or more times the appearance of a bite in the morning that was not there the prior evening, then this is very likely due to bed bugs. While this is by no means a definite sign, it is sufficient evidence to warrant calling an expert for a professional inspection.

Tips On Choosing A Bed Bugs Spray For Effective Pest Control

     

Use of a bed bugs spray is a very common method of eradicating the irritating bed bugs. Different types of products exist today in the marketplace. The problem with some of them is that they are just not effective. They are not really reliable when it comes to the elimination of bugs. If you have decided to try do-it-yourself technique with spray products, go ahead and choose the best ones. Besides, this is a cheaper method of eliminating pests although it might not work alone unless used with other methods. This is specifically true if the bed bug infestation in your home is unbearably severe.All the same, if you are determined to buy the most suitable spray, read on to realize how. Even though the situation in your house is getting desperate, calm yourself down. There is nothing that matters in this world than the safety of your family. You have to focus on the safety of your family when choosing the right chemicals to use. The insect killer component in spray options is permethrin, which is a harmless chemical substance. Some types do not have pesticides in them and their main component is natural oils. Their main role is killing the live pests and hindering hatching of the eggs.As you look for these items, pay attention to the product descriptions and features. There are many details you can discover by taking a few minutes to read the label. Specifically, check if the bed bugs spray is non-flammable for extra caution as well as non-toxic to be used around your pets and family. For additional safety, look for the Environmental Protection Agency mark. A good product should have this label. It is very important to perform a thorough cleaning in your house before you can even buy the spray. This can help reveal the extent of infestations you have to deal with.Secondly, it might reveal the generations of bed bugs you have in the house. The best sprays allow you to exterminate these insects in all stages of manifestation. You want to make sure that the item you have found is able to destroy eggs, nymphs and adult bugs. Get a very strong type if you suspect that you have been living with these parasites for a while and the number of adult ones seems very big. You can find plenty of them in the headboards, bed frames, under the mattress covers and other areas. As a result, you can only get rid of them by spraying and treating all infested garments, furniture, beddings, carpets and other stuff.Sometimes the mattresses and covers cannot be used again and one has to order new ones as the only workable solution. All in all, focus your attention on the most appropriate sprays. There are product reviews on the internet that you can read and find out what other people who have used a given product think of it. Even though you want an effective bed bugs spray, get a cheaper type. If possible, choose water-based styles to avoid staining your expensive upholstered furniture, sofa, beddings and so on. If you need it to treat these items, choose a non-residue type because it is harmless to humans.