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- W2374904575 abstract "[Objective]This paper studied the effect of different species of grass and different planting modes on population dynamics of Aphis citricola and their natural enemies in apple orchards.[Method] The investigation method we used is sampling on five points.[ Result] Compared with clean tillage orchard,the peak population quantity of Aphis citricola decreased markedly in grass garden,among which the population quantity of Aphis citricola in alfalfa area was least,which was less than 60% of clean tillage orchard,then the alfalfa-clover-ryegrass mixture area and the ryegrass area,which accounted for 67% and 81% of clean tillage orchard respectively. The dominant natural enemies in apple orchards are Chrysoperla sinica,Harmonia axyridis,Propylaea japonica and aphidiidae,the population quantity of natural enemies in grass garden was significantly more than that in clean tillage orchard. The population quantity of natural enemies which were on the tree and in the alfalfa were all the largest,and mixed area was next only to alfalfa area. After spraying fruit trees,the mortality of natural enemies which were on the tree was very for grass garden and clean tillage,but the mortality of natural enemies which in the grass was about half of which on the trees.[Conclusion] This dates showed that the grass played an effective role in the protection of natural enemies." @default.
- W2374904575 created "2016-06-24" @default.
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- W2374904575 date "2014-01-01" @default.
- W2374904575 modified "2023-09-28" @default.
- W2374904575 title "The Occurrence Regularity of Aphis citricola and Its Natural Enemies in Grass Apple Orchard" @default.
- W2374904575 hasPublicationYear "2014" @default.
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