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Population dynamics of lucerne aphid

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Investigations on population dynamics of lucerne aphid were carried out under field condition during 2018-19 at Instructional Farm, Junagadh Agricultural University, Junagadh. The activity of aphid, Aphis craccivora was commenced from 2nd week of February and remained upto 3rd week of March having peak during 4th week of February in lucerne crop. Simultaneously, higher population of lady bird beetles was observed during 4th week of January to 3rd week of March and showed significantly highly positive correlation with aphid population. |

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