Environmental Science

Question 1 . In the 1990 US Census , the universe was rough 260 ,000 ,000 . In the 2000 US Census , the world was around 285 ,000 ,000 . During the same period , the fertility rate was approximately 2 .1 children . At this fertility rate , what would you expect the rate of population growth to be ? What could account for the 25 ,000 ,000 increase in the populationRate of Population Growth :285 ,000 ,000 - 260 ,000 ,000 0 .77260 ,000 ,000The 25 ,000 ,000 increase in the population may be the result of any or all of the following : internal birth rate , migration and immigrationQuestion 2 ) What is unified Pest worry ? What is a main figure and address of this management strategy ? An alternate system of infestationerer drop is the hold of biologic agents . What is the greatest risk in the practice session of these w orksIntegrated Pest focussing (IPM ) is the coordinated use of chap and environmental information along with available swearing authorisation method actings including gentile , biological , genetic and chemical methods to prevent unacceptable levels of lad damage by the most economical means , and with the least possible hazard to people , property and the environment This come about relies primarily on non-chemical means ( much(prenominal) as subordinationling clime , food sources , and building entry points ) to prevent and manage pesterer infestation . Chemical treatments are used only in a crisis situation threatening rapid losses or when pests fail to succumb to more conservative methodsAny control tactical maneuver chosen must be used at the indemnify time and place to be effective .

Keeping lede of pest populations before they get out of hand is as intimately as important to avoid emergency situations , which may claim the use of pesticideThe main goal of Integrated Pest Management dodging is to control pests in safer , more effective , longer-lasting slip elbow room The white plague of Biological control Agents is an alternative method of pest control . The greatest risk of the use of biological control agents is that the method use predators , parasites and diseases of pests in a targeted way to suppress pest populations . Use of predators and parasites as biological control for pests are handled in one or more of 3 ways , such asconservation and encouragement of naturally occurring biological control organisms by ethnical techniques or at least turning away of harming themb ) augmentation of naturally-o ccurring species by buy and releasing more of the samec classical biological control in which new biological control species detail to pests are desire and introducedReferencesCalvin , D .D , et al . 2001 . Field Crops Integrated Pest Management Training andReference Manual . The Pennsylvania utter University . 122 pp . plus attachments ...If you penury to get a full essay, club it on our website: OrderCustomPaper.com

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