Effects of some bioinsecticides againts Myzus Persicae on pepper plant

Peach green aphid, Myzus persicae (Hemiptera: Aphididae) is an important pest of many economically important crops. They are not only harmful in plants, but also cause fumagine by developing saprophytic fungi in the sweet matter they produce during feeding. In addition, they can cause more serious problems than direct and indirect damages caused by vectors. Chemical preparations are generally used in control against the pest. As it is known, chemical control has negative effects on human health, natural environment and natural balance. In addition, it has resistance against to many chemicals because the pest gives a lot of generation in the short time. For this reason, studies on alternative control methods against pests, especially biological control studies, have gained importance recently. In this study, effects of four different biopesticides (Priority®, Nimbecidine®, Nostalgist®, Bio-Magic® ve Bio-Catch®) and a plant extract (Nimbedicine), and also for comparison Chlorpyrifos-ethyl, on M. persicae were investigated by spraying method under the loboratory conditions. Experiments were performed with two different methods (petri dishes and pots) in Biological Control Research and Applying Laboratory of Plant Protection Department. The preparats were applied as spray in pepper leaves placed in petri dishes and pepper plants in pots. After 10 minutes, 10 individuals were transfered into each petri dish and 5 aphids were placed into one leaf of each plant than 15 aphids were infested to each plant. Petri dishes and pots experiments were established with 10 and 4 replicates, respectively. After the applications, the counts were made on the 1st, 3rd, 5th and 7th days in the petri dishes and only on the 7th day in the pots. Live and dead individuals were recorded. As a result of the study, the effects to M. persicae of Bio-Catch®, Bio-Magic®, Nostalgist®, Priority®, Nimbedicine and Chlorpyrifos-ethyl according to Abbott in the petri dishes experiments were 39%, 35%, 47%, 39%, 68% and 100%, respectively on day 7th. In pot experiments, this effect is %44.44, %42.59, %53.70, %37.04, %68.52 ve %100.00 on day 7th. As a result, the most effective Chlorpyrifos-ethyl was found in M. persicae in both petri dishes and pot experiments, followed by Nimbedicine. The effects of bioinsecticides were similar.