Two Field experiments were conducted during 2020 and 2021
summer seasons at the Plant Protection Research Station at Qaha, Qalubiya
Governorate, to study the effect of Cinnamon Oil, Lupine oil, (ethyl alcohol,
acetone and petroleum ether) extracts from Cinnamon and Lupine plants and
Pasha (chemical insecticides) for control the Lima Bean Pod Borer, Etiella
zinckenella (Treit.). The concentrations of plant oils and extracts (v/w%)
used in this investigation were 2, 1 and 0.5% and were used at the
recommended concentrations for Pasha.
Cinnamon Oil, Lupine oil, petroleum ether extract from the
Cinnamon plant and ethyl alcohol extract from Lupine plant (2%) showed
maxima reductions in the larval population and Cinnamon Oil and Lupine
oil (2%) after the first and second sprays during 2020 and 2021 summer
seasons on cowpea green and dry pods, respectively.
Ethyl alcohol extract from the Cinnamon plant (2%) recorded the
highest percentage of total protein in cowpea grains (15.51 and 16.75%
during the two summer seasons, respectively). Also, the highest yield (green
and dry pods) was obtained after treatment by Cinnamon oil (2%) (1775 and
1000 kg/fed.) and (1880 and 1100 kg/fed.) in 2020 and 2021 summer
seasons, respectively.
Cinnamon Oil and ethyl alcohol extract from Cinnamon plant
(2%) used in the field resulted in the highest protection from pests during
the storage. Reduction in progeny was 99.16 and 97.97 for Cinnamon Oil
and ethyl alcohol extract from Cinnamon plant (2%) in seasons 2020 and
2021, respectively. Hence the efficiency of oils and plant extracts in
controlling insects leads to a reduction in the damage caused by insect pests
in the field and store.