| Article Details : |
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| | | Article Name : | | | Relative Toxicity of Biopesiticide and Insecticide
against Sucking Insect Pest on Sunflower | | Author Name : | | | ZAKIR ALI BHUTTO, ASLAM BUKERO, FIDA HUSSAIN MAGSI, ABID ALI SOOMRO, MAQSOOD AHMED CHANDIO, ASRAR MOHI-UD-DIN KASHMIRI, NAVEED ALI CHANNA, UMAIR QURESHI, AMMARA RAJPUT | | Publisher : | | | Bridge Center | | Article URL : |  | | | Abstract : | | | The field experiment was conducted to determine the efficacy of
conventional insecticide Novastar 56 EC and leaf extracts of tobacco
varieties Hazropattar and Balkhi as bio-pesticides against sucking
insect pests of sunflower. The experiment was laid out on a
Randomized Complete Block Design (RCBD) with three replications. Pre-treatment population of sucking insect pests was recoded one day
before application and post-treatment after 1st,4th, 7th and 10th day
after application. The reduction % in the populations of Amarasca
bigutulla bigutulla (Ishida), Bemisia tabaci (Genn.) and Thrip tabaci
were calculated for post- treatment intervals. Maximum reduction in
the population of A. b. biguttula was recorded as (73.86 %) at 7 DAS in
the plot treated with insecticide Novastar 56 EC as compared to biopesticides Hazropattar (40.15 %) and Balkhi (34.09 %) leaf extracts at
4 DAS, respectively. The population of Bemisia tabacii was reduced to
(76.74 %) at 7 DAS by Novastar. Whereas, leaf extracts of Hazropattar
and Balkhi reduced B. tabaci population to (46.32 %) and (38.95 %),
respectively at 7 DAS. The population of Thrip was reduced to (71.17
%) at 7 DAS by Novastar followed leaf extracts of Hazropattar (46.40
%) at 4 DAS and Balkhi (18.99 %) at 7 DAS. Similar trend of
reduction in the population of sucking insect pests was recorded after
2nd spray. Maximum reduction in the population of A. b. biguttula
was observed as (70.69 %) in the plot treated with Novastar followed
Hazropattar (45.52 %) and Balkhi (39.07 %), respectively. Maximum
reduction (77.67%) in the population of whitefly was recorded in the
plots treated with Novastar followed by Hazropattar (44.95 %) and
Balkhi (38.87 %). The population of Thrip was reduced to (76.39 %) by
Novastar followed Hazropattar (46.44 %) and Balkhi (22.31 %),
respectively. The analysis of variance showed significant difference in
the efficacy of insecticide and Bio-pesticides at (P<0.05). The maximum
yield of sunflower was obtained from the plots treated with insecticide
Novastar 56 EC followed leaf extracts of Hazropattar and Balkhi,
respectively. It is concluded that insecticide and bio-pesticides
significantly reduced the population of sucking insect pests. It is
suggested that bio-pesticides are environmentally safe and should be
sprayed with a gap of short intervals to avoid the infestation of sucking
insect pests on sunflower. | | Keywords : | | | Toxicity, Insecticide, Bio-pesticide, Sucking insect Pests,
Sunflower |
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