Effects of diversified agricultural ecosystems on pest management
1989
He Tan (Tibet Autonomous Region Inst. of Agriculrural Sciences, Lhasa (China))
The effects of the diversified agricultural ecosystem on the pest control were surveyed in the fields with different cultivation patterns in Tibet from 1985-1988. The results showed that natural enemies increased and pest insects decreased under the diversified field ecosystems. Generally, the number of the predacious or parasitic insects under mixed cropping was 2.3-6.0 or 1.4-2.7 times higher than under monoculture. The results also showed that crop yields were higher, soil fertility improved and pesticide application was decreased or unnecessary under the diversified systems
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