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5.5 chemical and biological control of pests
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PHEROMONE APPLICATION IN CONTROLLING PESTS
1. Introduction
Pest management has become more and more vital issue in the development of agriculture. Traditional pest control tends to apply pesticides to uncovered areas far from where it's needed and make use of it far more than necessary. Nowadays, scientists find a chemical substance from insects and make it applied in pest control, this kind of chemical substance is called pheromones. What are pheromones? Pheromones are the chemical substances that emitted by an organism that influences the behaviour of the same species.
The purpose of this paper is to explain the reasons and methods of using pheromones to control pests to improve the productivity and reduce pesticides usage simultaneously. First, the article will discuss the reasons why the pheromones should be used in pest management. Moreover, it will introduce the application of pheromones. And at the last, the paper will focus on the benefits and problems that will be generated in the procedure of pheromones application.
2. Reasons for Using Pheromones in Pest Control Purpose
2.1 Biological Characteristics of Pheromones
According to definition, pheromones are the class of chemical materials which insects and other organisms release to communicate with other individuals of their own species. Such kind of biological characteristic offer the scientists opportunities and direction to take advantage of the specificity of pheromones to manipulate the behavior of pests effectively. According to thousands of reliable experiments, scientists consider pheromones application as a feasible solution to release the increasing public concern about the massive of toxic pesticides to control insects. Steven J. Seybold & Su...
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N. Carter & H. Fraser. (2003, September). Mating Disruption for Management of Insect Pests. Retrieved March 31, 2010, from http://www.omafra.gov.on.ca/english/crops/facts/03-079.htm#useofmating
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What is a pesticide?A pesticide is a chemical substance used to kill pests, especially insects. A pesticide is also refered to as a biocide. Most pesticides are applied in spray form but occasionaly you will see pesticides that are in powder or pellet form. Pesticides are used on a variety of things, anything from crops like corn, barley, and wheat, to plants like petunias, marigolds, and rhodadendrons, which are usually found in small gardens greenhouses, and even in your backyard.
The spinosad insecticide is very active and effective in controlling insects and pests. It acts on both contact and ingestion by an insect. The insecticide is subjective to the stages of life of an insect such as larvae or adult stages and the insect species. The insecticide mode of action is through the neural mechanism. It affects the neural transmissions and processes of an insect. Spinosad is applied to field crops during the entire growth process as specified. It is applied to crops such as flowers, vegetables, fruit trees and also cereals. Some flower farmers spray their crops before harvest to rid them off harmful insects (Kole, 1995). Farmers use spinosad insecticide to kill harmful insects that destroy their crops and spread diseases lowering the yield. It is also used to control storage pests that destroy cereals stored in bins. Quality food produce is another reason for the applying the insecticide.
If preventive measures are not sufficient, “insecticides derived from natural plant extracts, natural soap or minerals or plant extracts such as neem, lemon grass, garlic, ginger and many more can be applied” (NP Agricultural Service and Partners Report, 36). Cotton farmers in Benin, for example, show that cotton can be grown without chemical pesticides, notably endosulfan (NP Agricultral Service and Partners Report, 37). Practices that can all be successful include encouraging natural predators, selecting resistant varieties, planting early maturing varieties which reduce the risk of pest attacks, use of rotation and trap crops and the use of food sprays for predators to improve the balance between useful insects and pests. (WHO,
Many control methods were carried out to suppress the pest population and keep it under the economic injury level. The recent intensive research is concerned mainly with avoiding the serious problems resulted from using harmful insecticides that cause harmful residues in the food chain and pollution of the surrounding natural enemies and pest resistance (Salwa et al., 2001).
What is a pesticide? A pesticide is a substance meant for attracting, seducing, destroying, or mitigating a pest. They are known as a class of biocide. The common use of pesticides is as plant protection products. This in general protects plants from damaging influences, such as weeds, plant diseases, or insects (“Pesticides” Wikipedia).
Actually it is said that insects are becoming immune to these poisons. When a insecticide is first used, a small group of the insects may survive the exposure to the insecticides due to their distinct genetics. These individuals pass along the genes for resistance to the next generation. The over and over uses of the insecticide will actually increase the proportion of less-effected insects in the population. Worldwide, more than hundreds species of insects have developed some degree of immunity. There are many important issues in the world regarding insecticides deterioration of the environment and it's affects on the average person. Though, the one that is worst then you know it is that individuals have it in the food that they consume. Yet it is still found daily in foods all around the world. Insecticides are used by produce growers to control insects and some pests that can destroy crops. These toxins are back firing on its users because they are being eaten by humans in the forms of fruits and vegetables that have remaining of the insecticide on them. How safe are these toxins to humans and what is being done help the environment and the health of humans and non-targeted animals? How much does the average person consume harmful amounts of toxins during every meal? If the levels are unsafe, why is this problem continuing to be ignored by the people who are supposed to
Now, you can find various repellents that you apply to your skin, or other tops which deject insects and other pests from climbing on that surface. In fact, these repellents are available based on sound production, particularly the ultrasound. True enough, these repellents help prevent the eruption of bug-borne diseases like dengue fever, malaria, West Nile fever and bubonic plague. According to many studies and researches, synthetic insect repellents tend to be more efficient and long last as compared to those natural repellents. Although there are DEET products that can also be very effective, synthetic repellents can provide adequate relief as well. Do check out the internet for more information on bug spray with
The development of new and chemical products with novel modes of action, and Integrated Pest Management (IPM) are factors that contribute to the reduction of pesticide resistance(Whalon et al. 2008). Effectively managing pesticide resistance will also help in reducing the harmful effects of pesticides by decreasing the rates of pesticide use and prolonging the efficacy of environmentally safe pesticides
One of the benefits of using pesticides is to kill pesticides and worms that feed on the crops. Pesticides have been used in public health, forestry, agriculture, and domestic sphere. One of the main reasons why pesticides are used is to increase farm yields. Agricultural chemicals have contributed to the increased crop production. The second benefit of pesticides is the protection of crops from diseases. Weeds have been a great deal to farmers because they decrease crop productivity. In this situation, a farmer would choose to use herbicides to kill the weeds. Insecticides are used to kill vector based diseases. Malaria is one of the leading diseases that is caused by mosquitoes which can be killed using insecticides (Levine 277)
Termites are blind insects, without pheromones they would not be able to continue to survive as a species, they use their pheromones to form trails, and mate. These trails are essential to them, the wood they are led to are their homes and their food. (Sillam-Dussè, 2010) The Douglas Fir Beetle has an advanced pheromone system, the female beetle can locate a tree via pheromone, will nest in the tree, release sex pheromones, attract a mate, turn attraction pheromones off and release a pheromone that will mask the tree from other beetles protecting their home. Ants are also insects that rely heavily on pheromones, these insects have around four primary functions for pheromones. Ants use this for marking trails, warnings of danger, a signal to leave and to mark their nesting site. While pheromones tend to be species specific, there are some exceptions to this idea. Some predators are able to mimic pheromones, luring their prey near them for easy food. Multiple kinds of insects commonly referred to as assassin bugs have mastered the ants pheromone codes, these creatures use this knowledge primarily
the best time for controlling these pests; but also giving the best method of their control by alternative insecticides, e.g. [Mineral oils, I. G. R. and biological insecticides] and the synthetic insecticides and the comparison between them. .
There are many strategies and tactics for insecticide resistance management that we can take it to solve our factors that influence resistance management problem. Hence, to accomplish this goal, resistance surveillance has three objectives. Firstly, before to begin the control operation, we must provide baseline data for program planning and pesticide selection. Secondly, we must detect resistance at an early stage and lastly, we must monitor the effect of control strategies on resistance continuously.
making them less prone to attack by fungi and insects. The use of sex pheromones
Instead of using pesticides in farming a better alternative would be biological control. This is when a natural predator is released into the crop growing area as a result the number of pests can be reduced.
The pesticide is a controversial topic since farmers are used it to gain their yield. Especially, pesticide is discovered during World War II as a chemical weapon that mixture of multiple chemicals together to kill human. Therefore, Chantries redesign pesticide to kill an organism where and when we don’t want it. Because people want to go to the grocery store to buy the perfect product, pesticide makes it happens and with a little cost for farmers. Nonetheless, pesticide also is the expenditure of life expectancy, which directly threatens people and poses risk of mortality rate. Abusing the pesticide has multiple affects on our society, (Add). (Add thesis)