Effect of Different Host Plants on Nutritional Indices of the Pod Borer,Helicoverpa armigera

Abstract

Nutritional indices of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) on different host plants including chickpea (cultivars Arman, Hashem, Azad, and Binivich), common bean (cultivar Khomein), white kidney bean (cultivar Dehghan), red kidney bean (cultivar Goli), cowpea (cultivar Mashhad), tomato (cultivar Meshkin) and potato (cultivars Agria and Satina) were studied under laboratory conditions (25 ± 1 °C, 65 ± 5% RH, 16:8 L:D). Third instar larvae reared on potato Agria showed the highest efficiency of conversion of digested food (ECD) and efficiency of conversion of ingested food (ECI) (50.800 é 0.104% and 13.630 ± 0.016%, respectively). Approximate digestibility (AD) values of the fourth instar larvae were highest (92.651 ± 0.004%) and lowest (57.140 — 0.049%) on chickpea Azad and potato Agria, respectively. The fifth instar larvae fed on tomato Meshkin and white kidney bean Dehghan had the highest consumption index (CI) (3.717 ± 0.091) and relative consumption rate (RCR) (1.620 ± 0.074), respectively. Whole larval instars showed the highest ECI and ECD values on potatoes Satina (14.640 ± 0.014%) and Agria (21.380 ± 0.015%), respectively, and the lowest of both values on tomato Meshkin (ECI: 5.748 ± 0.002% and ECD: 7.341 ± 0.002%). The results of nutritional indices and the cluster analysis indicated that tomato Meshkin was an unsuitable host for feeding of H. armigera.

Nutritional Performance of the Tomato Fruit Borer,Helicoverpa armigera, on Different Tomato Cultivars

“…The results for AD value of the whole larval instars reared on CH falat and Rio grande UG were different from those reported by Hemati et al (2012) on tomato var. Meshkin (67.470 ± 0.016%).…”

“…A similar result was reported in numerous studies on H. armigera and other insects ( Barbosa and Greenblatt 1979 ; Naseri et al 2010 ; Arghand et al 2011 ; Hemati et al 2012) . Also, the results of whole larval instars showed that there is a negative correlation between RCR and ECI values.…”

“…The trend of increase in ECD from early to late instars has been reported by Slansky and Scriber (1985) and Hemati et al (2012) . Nation (2001) noted that the physiological changes in the penultimate and ultimate instars reared on different host plants probably are responsible for the differences in such decreases in ECD values of the two larval instars.…”

Effect of Artemisia annua L. essential oil on toxicity, enzyme activities, and energy reserves of cotton bollworm Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

“…The insects were kept in transparent plastic containers (10 × 5 × 5 cm) at 26±1°C, and a relative humidity (RH) of 65±5%. The photoperiod was 16 L : 8 D h (Hemati et al 2012).…”

Exploration on resource of resistance in chickpea (Cicer arietinum L.) genotypes to gram pod borer Helicoverpa armigera (Hubner) (Lepidoptera)

“…Although the modes of resistance or susceptibility of these arrays are not yet clear, it might be genotype based. Different nutritive values of host plants may also influence the rate of development of H. armigera larvae, thus affecting the population dynamics of this pest (Hemati et al, 2012). In spite of the pest hit in the season, there was an enhancement in yield when genotypes with resistance modes were planted.…”