No abstract

The chickpea pod borer Helicoverpa armigera (Lepidoptera: Hübner) is most severe insect pest in Asian countries due to its high mobility, fecundity rate and overlapping generations (Sarode, 1999). On an average, it causes 30-40% yield loss in chickpea Abstract | Pod borer (Helicoverpa armigera) is economically vital insect pests for chickpeas and caused huge yield losses in south Asian countries. Host plant resistance, physio-morphic characters counteract the ability of insect to demage and to cause minimum reduction in yield. The experiment was conducted under natural and semi-natural conditions to determine the host plant resistance of nine (09) chick pea advance genotypes viz., (K01211, K01216, K01241, K01242, K09012, KO1308, K014001, K014002, K-14003) and one (1) control (Noor). Antixenosis was calculated by counting the number of eggs per stem and antibioses was assessed by counting the number of infested leaves and survival rate of pest. The results revealed that H. armigera infestation started to appear during the second fortnight of February that continued to increase till the crop maturity. Lowest number of eggs (115) were recorded on K01308 while K09012 and K01242 were found to be most preferred for oviposition (261 and 250, respectively). Maximum larval survival about 0.98 was recorded on K09012 followed by K01216. Whereas, minimum was recorded on K014001 followed by K01308 and K014002.Minimum leaf damage percentage (1.1289%) was observed in K014001 followed by K014002, K14003 and K01308 however maximum damage (7.25%) was observed in K01242.

Chickpea (Cicer arietinum L.) commonly known as gram is a widely cultivated grain legume crop in the Leguminosae (Fabaceae) family. Gram pod borer (Helicoverpa armigera) is known as the most damaging pest of chickpea that damages various parts of plants at different growth stages. Various physio-morphological characteristics tend to affect the infestation of pod borer as pod wall thickness, pod trichomes density, and pod color. For this purpose, research was conducted in the field area of Entomological Research Institute, AARI, Faisalabad. Nine Kabuli chickpea genotypes i.e. PCK-15001, PCK-15019, PCK-16010, PCK-16027, PCK-17001, PCK-17007, PCK-17018, PCK-17030, and NOOR-2019 were sown under RCBD design having three replications. The results showed that the genotype “PCK-17030” had a significantly highest population of pod borer of 0.97larvae/plant and showed the highest pod damage of 7.39% while the genotype“PCK-16027” was the lowest infested with 0.69 larvae/plant of pod borer. On the other hand, the genotype “Noor-2019” showed the lowest pod damage of 6.42%. It is, therefore, concluded that pod wall thickness and density of pod trichomes had a negative relation to the damage of pod borer. As regards pod color, it was observed that there was the maximum pod borer damage in the genotypes having green colored pods as compared to the genotypes having pods with yellowish brown streaks.

No abstract