Effects of larval host plants on over-wintering preparedness and survival of the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

Soybean Cultivars Affecting Performance of Helicoverpa armigera (Lepidoptera: Noctuidae)

“…Probably, because of no significant effect of the soybean cultivar as larval food on the adult size (fore-wing area) of the pest, this effect has disappeared in the adult. In addition, ability of an insect to store energy (e.g., pupal weight and lipids and glycogen levels) is varied depending on host plant of its larvae (Liu et al, 2007). The results of this study suggest that M7 and Zane are more nutritive and M4, Sahar and JK are less nutritive for H. armigera larvae compared to the others.…”

Effect of three species of host tree on the cold hardiness of overwintering larvae of Anoplophora glabripennis (Coleoptera: Cerambycidae)

“…In addition, low molecular weight sugars and polyols, including glycerol and trehalose, act as cryo-protective agents in many species of insects during overwintering (Storey & Storey, 1991;Koštál et al, 2007;Liu et al, 2007Liu et al, , 2009. In this study, larvae from S. matsudana had the highest concentrations of glycerol and trehalose, and lowest SCP.…”

“…In this study, larvae from S. matsudana had the highest concentrations of glycerol and trehalose, and lowest SCP. A previous study reports that supercooling is associated with host plants and the concentration of glycerol in H. armigera (Liu et al, 2007). Thus, it is likely that the concentration of glycerol and trehalose are associated with cold resistance.…”

Larval feeding preference and performance of the cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), on different flower parts of cosmos

“…Intensive feeding on disc florets may enable larvae to gain a nutritional advantage and to shorten their developmental periods. Furthermore, larger individuals have a greater energy storage capacity and thus have a higher probability of surviving the winter (Liu et al, 2007(Liu et al, , 2009. Similarly, the larger pupal weights of larvae fed on disc florets indicate that feeding on this plant part may confer some advantages to larvae for overwintering compared to larvae feeding on ray florets.…”