Pests contaminate food and other daily-use items, cause health problems like asthma, and can spread disease. They can also harm pets and native wildlife.
Remove their food, water, and shelter to keep pests at bay. For example, put rubbish in a tightly closed bin and regularly empty birdbaths to remove mosquito-breeding puddles. Contact Pest Control Irving TX now!
Depending on their role and the conditions of life, insects can be pests or beneficial. The latter pollinate plants, produce useful substances, and control pest insects. They also act as scavengers and serve as food for other animals (see Importance). Insects are also valuable objects of scientific study, contributing significantly to our understanding of genetics, hormones, and sense organ function, among other things.
However, despite their numerous benefits, insects can also be vectors of pathogens and cause serious economic losses for humans. Arthropods such as cockroaches, flies, mosquitoes, ticks, fleas, and sandflies are responsible for 700,000 human deaths yearly because of insect-borne diseases. Insects can transmit pathogens in three ways: mechanically, by absorbing the contamination on feces, sewage, or other biological fluids; biologically, by obtaining the pathogen through a blood meal from an infected host; and chemically, by introducing microorganisms through contaminated feed and rearing conditions.
Insects that cause damage to crops are of concern because they may carry disease organisms and can reduce crop yield and quality. For example, the shoot fly Atherigona pulla and other flies infest proso millet in Africa and India, and the wheat stem maggot Meromyza americana causes severe damage to seedlings in the United States. In addition, thrips like Haplothrips aculeatus and mites such as Chrysomelidae, Acarina spp and Diabolocatantops axellaris attack leaves, earheads and stems of grain crops. The caterpillars Pelopidas mathias and Oedaleus senegalensis attack grass crops, causing distortion, curling, discoloration and poor emergence.
It is important that public health professionals address these issues, enforcing the role they play in regulating and exploiting the benefits of insects while minimizing threats to human and animal health. This includes ensuring that insect farming and processing is safe and efficient. To do this, public health authorities should establish effective surveillance and testing systems along the whole supply chain. Additionally, they should improve rearing and management conditions and animal welfare, in particular by addressing stress, the risk of injury and cannibalism, and euthanasia methods. They should also support research activities on different aspects of the insect-public health interface.
Rodents
Rodents are a diverse group of mammals that can be recognized by their prominent front teeth called incisers, which never stop growing throughout the rodent’s lifetime. They are the second most successful mammal species on Earth, inhabiting every continent except Antarctica and being found in a variety of habitats such as forests, rock crevices, burrows, leaf and bark structures, or clogged garbage bins.
Rodents can cause damage to human structures and the surrounding environment. In addition to gnawing on electrical wiring and insulation (posing fire hazards), they may chew through wood beams, create holes in walls and attics, and contaminate food. They also destroy crops, spread disease through direct contact or through the contaminating effects of their droppings.
On campus, rodents are a problem because of their large numbers and habit of seeking out shelter and food close to humans. In addition to their destruction of property, they pose a serious health threat to people by spreading diseases such as Hantavirus Pulmonary Syndrome, Leptospirosis, and Salmonellosis through bites or the consumption of contaminated foods.
Using preventative measures is important in reducing rodent problems. These include eliminating access points that rats and mice can use to enter buildings, removing sources of food and water, and reporting any large gaps around doors, vents, etc., to your local facilities group.
Keep garbage and compost bins as far away from buildings as possible and make sure they have a tight-fitting lid. Do not leave out pet food or water overnight. Remove weeds and other vegetation that provide shelter to rodents. Maintain at least a 2-foot space between bushes, shrubs, and fences and remove tree limbs that are within 3 feet of a roof or building.
Regular inspections are important in identifying rodent signs like gnaw marks, droppings, urine, and feces. Also, listen for noises such as scratching or scurrying during quiet hours. Also, inspect less visible areas like behind appliances and in cabinets for evidence of rodent activity. A good pest control program includes both prevention and extermination tactics, so the key is to be proactive.
Pathogens
Pathogens are microscopic organisms that cause disease. They can be bacteria, viruses, fungi, protozoa or even infectious proteins called prions. All of them have one thing in common: they must be able to enter their host and multiply to make you sick. They can also be carried on the skin of animals, transmitted by bites from infected insects and, in some cases, transmitted through air, water or food.
Infections caused by pathogens can vary in severity from mild inconvenience to assured death. They can affect the skin, eyes, lungs and gastrointestinal tract. They can be spread from person to person by direct contact, such as touching an infected hand or mouth after using a toilet or changing a baby’s diaper. They can also be spread by breathing in droplets of microorganisms when someone coughs or sneezes. They can be spread by consuming contaminated food or water and through blood-sucking insects, such as mosquitoes that carry the virus for malaria.
Some pathogens only infect a single species of animal, while others have an extraordinarily wide range of host species. For example, the bacteria that cause leprosy are restricted to a few species of wild animals, but they can infect human beings.
Pest control is often focused on preventing diseases that might otherwise affect plants and people. It might be a matter of suppressing the populations of certain pests to prevent them from growing into a nuisance, or it might be a matter of eradicating them entirely. Prevention is usually a goal in outdoor situations, where you can predict the conditions that will favor pest growth. Eradication is more common in indoor areas, where the conditions that support pests are less likely to occur.
Insects, like all other living things, are infected by bacteria, fungi, protozoa and viruses that can reduce their rate of feeding and growth, inhibit reproduction or kill them. These natural enemies are important natural controls of insect pests, and some of them have been cultivated and commercially formulated for use as insecticides. Bacteria such as Bacillus thuringiensis, or Bt, for instance, have been developed to produce a protein that interferes with an insect’s ability to eat.
Chemicals
Whether they’re used in the home garden or on large farms, pesticides travel through the environment after application. Pesticides may move from the place of application to non-target plants and environmental media by chemical degradation, evaporation into the air, leaching into ground water, spray drift or runoff. These movements are influenced by factors such as soil conditions, weather and temperature, and the type of pesticides applied.
A pesticide’s toxicity depends on its mode of action, which is how it kills the targeted organism. For example, organophosphates and carbamates act like nerve gas, interfering with nerve transmission. If ingested, they can cause headaches, dizziness, nausea, vomiting, chest pain and difficulty breathing. If they come in contact with the skin, they can irritate and burn the skin.
In addition, many pesticides can have negative influences on non-target organisms (e.g., birds, fish and honeybees). These effects occur through direct contact or as a result of pesticide residuals that remain in the soil after the target plant has been killed. Generally, the more persistent and hazardous the chemicals are, the more likely they are to be transported and accumulate in non-target plants and environmental media.
Before a pesticide can be sold, it is tested to determine its acute toxicity to mammals. Laboratory rats of known weight are fed a specific amount of the pesticide’s active ingredient and monitored for survival. The number of rats that die is the LD50, or lethal dose that causes 50% of the population to die. Often, the more specific a pesticide is to its target insect, the higher the LD 50 value will be.
The environmental behavior of a pesticide is influenced by its chemical characteristics, such as water solubility, soil sorption constant (Koc) and octanol/water partition coefficient (Kow). Those with high Koc and low Kow values will strongly bind to the organic matter in soils, which results in long-term accumulation and persistence in the environment.
Whenever possible, use organic materials to control pests rather than chemical methods of control. If a chemical is needed, be sure to follow label instructions for safety and dispose of unused or partially used containers on household hazardous waste collection days or with your local trash service. When hiring a pest control company, be sure to ask for an inspection and a written program before you sign a contract. The program should include specific names of pests to be controlled and the types and amounts of chemicals to be used, as well as a statement of any safety concerns you might have.