Effect of biofertilizers and carbolizer on population density of green peach aphid Myzus persicae on Gerbera jamesonii(bolus)‎in greenhouse

الملخص EN

This study was conducted to investigate the effect of some bio-fertilizer bacteria (Azotobacter chroococcum and Bacillus subtilus), mycorrhiza (Glomus mosseae) and combination of both (bacteria and mycorrhiza) and carbolizer with two levels (1.5 ml.

L‾¹ and 2.5 ml.

L‾¹), a combination of Bacteria and/or Mycorrhiza with each level of carbolizer and their combination together, plus the control on the population dynamics of Myzus persicae, which infest Gerbera plants under greenhouse condition.

The results revealed that inoculation of jerbera plants with bacteria and micorrhiza gave the values of aphid population of 11.45 and 9.78 aphid.plant-1, respectively, with significant differences.

However, foliar application of carbolizer with 1.5 and 2.5 ml.L-1 gave the values 8.34 and 8.22 aphid.plant-1, respectively with no significant differences.

The combination of both mycorrhiza 2.5 ml.

L‾¹ and carbolizer significantly lowered the aphid population to 3.11 aphids.

plant ‾¹ in comparison with the control 16.83 aphids.

plant ‾¹.