Translator Disclaimer
4 June 2020 Interaction Among Peel Hardness, Fruit-Age and Gibberellic Acid on Infestation Susceptibility of Citrus Fruits by Peach Fruit Fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae)
Author Affiliations +
Abstract

Influence of gibberellic acid (GA3) on susceptibility of citrus fruits to infestation by Bactrocera zonata was studied under field conditions. The susceptibility of navel orange and mandarin fruits to infestation by PFF was affected firstly by GA3 treatments in a dose-dependent manner and secondly by host type. GA3 treatment was more effective on mandarin than navel orange in terms of rate of false punctures and egg-laying density, whereas it showed more effect on the true puncture numbers of navel oranges than mandarins. The results also showed that fruit infestation parameters were inversely proportional to fruit peel hardness. Fruit peel hardness was GA3 dose-dependent, with significant differences between host types, as well as among GA3 concentrations, with higher values on navel orange than mandarin. Results also revealed that date (progress of fruit age) had a weak effect on both infestation parameters by PFF, and fruit peel hardness. The study provides clear evidence that exogenous application of GA3 could be incorporated in IPM programmes for citrus to decrease the infestation rates by PFF.

©Entomological Society of Southern Africa
I.R. El-Gendy, K.A. Draz, M.A. El-Aw, and H.F. Darwish "Interaction Among Peel Hardness, Fruit-Age and Gibberellic Acid on Infestation Susceptibility of Citrus Fruits by Peach Fruit Fly, Bactrocera zonata (Saunders) (Diptera: Tephritidae)," African Entomology 28(1), 125-132, (4 June 2020). https://doi.org/10.4001/003.028.0125
Received: 18 March 2019; Accepted: 3 September 2019; Published: 4 June 2020
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top