Chapter 1 Population Dynamics and Mechanisms of Pest Insects Wu Junxiang Li Yiping Junxw@nwsuaf.edu.cn yp2003@126.com
Chapter 1 Chapter 1 Population Dynamics and Population Dynamics and Mechanisms of Pest Insects Mechanisms of Pest Insects Wu Junxiang Junxiang & Li Yiping Junxw@nwsuaf.edu.cn lyp2003@126.com
Lecture outline: Ecological basis of IPM Economic principles of IPM Categories of pest insects and conditions causing disaster >Survey on and sampling of pest insects Forecast of pest insects
Lecture outline: Lecture outline: ¾ Ecological basis of IPM Ecological basis of IPM ¾ Economic principles of IPM Economic principles of IPM ¾ Categories of pest insects and Categories of pest insects and conditions causing disaster conditions causing disaster ¾ Survey on and sampling of pest Survey on and sampling of pest insects insects ¾ Forecast of pest insects Forecast of pest insects
I.Ecological basis of IPM Ecosystem Environment Population growth Competifion
Ⅰ. Ecological basis of IPM Ecological basis of IPM 9Ecosystem Ecosystem 9Environment Environment 9Population growth Population growth 9Competition Competition
Ecology (lit.)study of the abode or home Community-level The economy of nature (energy flow)and the interaction among environmental factors that may affect this flow. Community Population-level The distribution and abundance of organisms as affected by their environment. Population Individual-level The effect of the environment on survival and reproduction. Individual
Ecology = (lit.) study of the abode or home Community-level = The economy of nature (energy flow) and the interaction among environmental factors that may affect this flow. Population-level = The distribution and abundance of organisms as affected by their environment. Individual-level = The effect of the environment on survival and reproduction
1.Ecosystem The ecosystem is the "home". The ecosystem includes: ·Climate and weather ·A place to live ·Food to eat Others of the same kind Different kinds of organisms
The ecosystem is the “home”. The ecosystem includes: • Climate and weather • A place to live • Food to eat • Others of the same kind • Different kinds of organisms 1. Ecosystem 1. Ecosystem