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| Efficacy of Different Insecticides against Pod Borer Helicoverpa Armigera in Gram Field Jaffarabad Balochistan |
Ghulam Ali, Mitha khan, Abdul Rehman, Sami ullah khan,Abdul Raoof khan,Abdul Qayyum Zehri,Abdul Waris.
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Abstract:
This study was carried out at jaffarabad on chickpea variety DG 91. Two applications were done to determine the efficacy of Match 030 EC, Polytrin-C 400 EC, Lorsban 50 EC insecticides at 15 days interval. The observation was recorded before treatment and after 24, 48, 72, 96 hours and one and two week. The pre-treatment count of the H. armigera in plot applicationed with Match (1.90±0.18) which was decreased to 1.33±0.19, 1.00±0.30, 0.73±0.12, 0.67±0.13, 0.70±0.13 and 0.40±0.09/plant, respectively; followed by the plot applicationed with Polytrin-C the H. armigera population for the observation of pre-treatment (2.70±0.26) which was decreased to 2.00±0.19, 1.70±0.19, 1.53±0.17, 1.07±0.17, 1.03±0.21 and 0.40±0.09/plant after 24, 48, 72, 96, one and two week of application, respectively. in the same way, on the plot applicationed with Lorsban, the pre-treatment pod borer population was (3.17±0.21) reduced to 2.73±0.19, 2.37±0.19, 2.07±0.18, 1.93±0.30, 1.70±0.22 and 1.50±0.24/plant after 24, 48, 72, 96, 1 week and 2 weeks of application, respectively. In case of untreated control plots, the population of the H. armigera remained frequently high all through the study period which was 3.77±0.45 before treatment, 3.97±0.42, 4.00±0.54, 4.20±0.67, 4.23±0.51, 4.80±0.62 and 5.30±0.43/plant after 24, 48, 72, 96 hours , 1 week and 2 weeks of application, respectively. The second application results showed that the H. armigera population varied significantly (P<0.05) when observed after 24, 48, 72, 96, one and two week after of application; while pre-treatment population on the experimental units was almost uniform and non-significant (P>0.05)After second application the population of H. armigera before treatment with Match was (2.00±0.17) declined to 1.60±0.18, 0.97±0.13, 0.83±0.13, 0.70±0.13, 0.57±0.10 and 0.23±0.08/plant, respectively; followed by the plot applicationed with Polytrin-C whereas the pre-treatment observation of pest population (2.80±0.24) decreased to 2.57.±0.25, 2.07±0.24, 1.90±0.26, 1.67±0.26, 1.53±0.27 and 1.47±0.22/plant after 24, 48, 72, 96, one and two week of application, respectively. correspondingly, on the plot applicationed with Lorsban, the pre-treatment pest population was (3.17±0.21) reduced to 2.73±0.19, 2.37±0.19, 2.07±0.18, 1.93±0.30, 1.70±0.22 and 1.50±0.24/plant after 24, 48, 72, 96, 1 week and 2 weeks of application, respectively. In case of untreated control plots, the population of the H. armigera remained persistently high all through the study period which was 3.77±0.45 before treatment, 3.97±0.42, 4.00±0.54, 4.20±0.67, 4.23±0.51, 4.80±0.62 and 5.30±0.43/plant after 24, 48, 72, 96, 1 week and 2 weeks of application, respectively. The observations of the second application showed that all the insecticides tested in this study against H. armigera were effective to control the population. Maximum crop yield was recorded in plot treated with Match and minimum crop yield was recorded in control plot. On the basis of efficacy of insecticides, the insecticides were ranked as Match > Polytrin-C > Lorsban.
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