DYNAMIC OF DEVELOPMENT OF GREEN ROSE LEAF APHIDE (MACROSIPHUM ROSAE L.) IN OIL-BEARING ROSE (ROSA DAMASCENA MILL.)

Zheko Radev

Abstract


The study on the rate of infestation in oil-bearing rose plantations were made from April 10 to July 10, 2020, it’s describing the meteorological situation during the reporting days. In farms where aphid’s treatments were carried out, the infestation rate ranged from 0 to 1 point. The dynamics of the population density of green rose aphids in non-insecticide treated farms is interesting. It is closely related to natural factors, and meteorological conditions this year have regulated the rate of infestation. Climatic factors influence the dynamics of development of harmful and beneficial entomofauna. In the first half of May, heavy rains were reported, which washed away the aphides and thus reduced the infestation rate to 1 point, which remains until the end of the month.

Keywords


Rosa damascenа, dynamic, development, Macrosiphun rosae

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New knowledge Journal of science is financed by the National Science Fund of the Republic of Bulgaria - contract № КП-06-НП1/5 of 17.12.2019 in the competition of Bulgarian scientific periodicals – 2019

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