Lecture 26: IMPACT OF GLOBAL WARMING ON PESTS
What is global warming?
SUN Earth reflects some solar energy
as infrared radiation
Green house gases
Infra red radiation from earth
reflected back to earth by green
house gases. This increases the
Solar radiation temperature of earth and lower
falls on earth atmosphere. This is called
surface. Earth global warming or greenhouse
absorbs and effect
gets heated up EARTH
- Warmth from sun heats the surface of the earth
- Earth absorbs most of the energy but reflects back some energy in the form of
infra red radiation
- Greenhouse gases (e.g. CO2, Methane, CFC (Chloro Fluoro Carbon), Nitrous
oxide) present in atmosphere trans the infrared radiation and reflects back to earth
- This reflected energy falls on earth and also lower atmosphere and keeps it
warmer (Heats the earth’s surface)
This is called global warming or green house effect.
Effect of global warming on world and agriculture
- Increase in overall temperature on earth (e.g.) Earth’s surface temperature has
increased 1.4oF in lst one century (Forecast: 5oF rise in next century)
- Change in climate tremendously
- Melting of ice in Polar region
- Increase in seas level and submerging of coastal areas
- Flooding and intense down pours
- Drought in warmer regions
Impact of global warming on pest status
1. Due to change in climate, temperature and water availability, the farmers may
change the type of crops grown.
2. Due to increase in temperature, there can be outbreak of certain insect pests and
diseases.
What is global warming?
SUN Earth reflects some solar energy
as infrared radiation
Green house gases
Infra red radiation from earth
reflected back to earth by green
house gases. This increases the
Solar radiation temperature of earth and lower
falls on earth atmosphere. This is called
surface. Earth global warming or greenhouse
absorbs and effect
gets heated up EARTH
- Warmth from sun heats the surface of the earth
- Earth absorbs most of the energy but reflects back some energy in the form of
infra red radiation
- Greenhouse gases (e.g. CO2, Methane, CFC (Chloro Fluoro Carbon), Nitrous
oxide) present in atmosphere trans the infrared radiation and reflects back to earth
- This reflected energy falls on earth and also lower atmosphere and keeps it
warmer (Heats the earth’s surface)
This is called global warming or green house effect.
Effect of global warming on world and agriculture
- Increase in overall temperature on earth (e.g.) Earth’s surface temperature has
increased 1.4oF in lst one century (Forecast: 5oF rise in next century)
- Change in climate tremendously
- Melting of ice in Polar region
- Increase in seas level and submerging of coastal areas
- Flooding and intense down pours
- Drought in warmer regions
Impact of global warming on pest status
1. Due to change in climate, temperature and water availability, the farmers may
change the type of crops grown.
2. Due to increase in temperature, there can be outbreak of certain insect pests and
diseases.
