Insecticidal effect some plant extracts on Myzus persicae Sulzer (Hemiptera: Aphididae)Abstract :
peach aphid, (Myzus persicae Sulzer)(Hemiptera: Aphididae),
is a very important pest causing serious
damage to vegetables, flowers and fruit crops. The efficacy of extracts from
four plants namely Melia azedarach L. (Meliaceae), Veratrum album L. (Melanthiaceae), Rhododendron luteum Sweet (Ericaceae), and Helichrysum
arenarium L. (Asteraceae) was
tested in a search for alternative insecticides. Bioassays were conducted by
two different methods to determine the effects of different concentrations.
Experiments were performed using 30 mm diameter leaf discs from radish plants, Raphanus sativus L. (Brassicaceae).
Each treatment and control were replicated ten times.As a result of the investigation, in the leaf dipping method, the extract of M. azederach, V.
album, R. luteum and H.
arenarium caused 94%, 67%, 65% and 61% nymph mortality respectively
at 12% concentration. The mortalities of adults at the same concentrations were
91%, 85.71%, 57% and 61% respectively. For the spraying method, adult mortalities for M. azederach, V. album, H.
80.84%, 58% and 58% respectively at the same concentrations
extract, insecticidal effect, green peach aphid