Morphological and Biochemical Constituents Influencing Aphids and Whiteflies Tolerance in Tomato Genotypes

Abstract

Effects of morphological and biochemical constituents on the population of sucking insect pests infesting tomato plant were evaluated. Among the twenty genotypes evaluated under field condition at different seasons (summer, kharif, rabi), it revealed that the genotypes namely BRDT-1, EC 620421, Solanum peruvianum, EC 538455 and S. cheesmaniae had minimum number of aphid and whitefly population throughout all the three seasons due to their morphological traits like more trichome density and thick stem diameter as well as the presence of biochemical attributes like phenol and tannins which were present in those genotypes at higher concentration. The higher content of leaf chlorophyll had resistance effect against the population of aphid and whitefly, while total sugar content did not have any significant effect on resistance. Bangladesh J. Bot. 50(3): 483-489, 2021 (September)

Population changes of Bemisia tabaci (Hemiptera: Aleyrodidae) on different colored poinsettia leaves with different trichome densities and chemical compositions

“…In our study, the type and content of volatiles also differed between red and green poinsettia plants. Phenol content was negatively related to the number of insect population (Selvanarayanan and Muthukumaran 2005, Anu et al 2021), the phenol content of poinsettia was higher in its red leaves. Previous studies have shown that alpha-copaene is an attractant to many insects, such as the fruit fly, beetles, and cocoon bees (Shelly et al 2004, Kendra et al 2016, Ortiz-Carreon et al 2019, Liu et al 2022).…”