Title: Pesticide resistance - Wikipedia
Headings: Pesticide resistance
Pesticide resistance
Contents
Causes
Examples
Consequences
Multiple and cross-resistance
Adaptation
Management
Integrated pest management
Status
Glyphosate
B. thuringiensis
See also
References
External links

Content: Pesticide resistance is increasing. Farmers in the US lost 7% of their crops to pests in the 1940s; over the 1980s and 1990s, the loss was 13%, even though more pesticides were being used. Over 500 species of pests have evolved a resistance to a pesticide. Other sources estimate the number to be around 1,000 species since 1945. Although the evolution of pesticide resistance is usually discussed as a result of pesticide use, it is important to keep in mind that pest populations can also adapt to non-chemical methods of control. For example, the northern corn rootworm ( Diabrotica barberi) became adapted to a corn-soybean crop rotation by spending the year when the field is planted with soybeans in a diapause. As of 2014
[update]
, few new weed killers are near commercialization, and none with a novel, resistance-free mode of action. Similarly, as of January 2019
[update]
discovery of new insecticides is more expensive and difficult than ever. Contents
1 Causes
2 Examples
3 Consequences
4 Multiple and cross-resistance
5 Adaptation
6 Management
6.1 Integrated pest management
7 Status
7.1 Glyphosate
7.2 B. thuringiensis
8 See also
9 References
10 External links
Causes
Pesticide resistance probably stems from multiple factors: