Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal JPT : JURNAL PROTEKSI TANAMAN (JOURNAL OF PLANT PROTECTION)
Venkatesha, Melally Giddegowda
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Environmental Science

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Chemical Composition of Cymbopogon flexuosus and C. winterianus Essential Oils and Their Insecticidal Potential Against the Coffee Berry Borer Hypothenemus hampei: Venkateaha Venkatesha, Melally Giddegowda; Kiran, Rudramuni
Jurnal Proteksi Tanaman (Journal of Plant Protection) Vol. 7 No. 2 (2023): December 2023
Publisher : Plant Protection Department, Faculty of Agriculture, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.7.2.65-77.2023

Abstract

Hypothenemus hampei is the most important insect pest of coffee in the world. H. hampei is controlled by using endosulfan and methyl bromide. However, using these two chemicals may pose pesticide resistance, bioaccumulation, and a threat to human health and the environment. This study evaluated the chemical compositions of essential oils from Cymbopogon flexuosus and C. winterianus and their insecticidal potential against H. hampei as an alternative to endosulfan and methyl bromide. The chemical profiles of the two essential oils showed that both constituted biochemically distinct monoterpenes and sesquiterpenes. The main compounds identified in C. flexuosus were citral, geraniol, and isoforms, representing 76.45% of the total composition, and other active ingredients were citronella, caryophyllene, citronellyl acetate, cadinene, linalool, and limonene. The composition of C. winterianus was citronella, nerol, and citronellol as principal components, corresponding to 66.47%, along with other active ingredients elemol, geranyl acetate, citronellyl acetate, germacrene, and limonene. Differential sensitivity of H. hampei adults was observed in the bioassay of two oils, where a dose-dependent increase in mortality was observed. Among two concentrations of both essential oils, 100% mortality was observed at 500 and 1000 ppm within 48 and 24 hours of treatment, respectively. The significant biological activity of both Cymbopogon species oils indicated a potential source for further development of botanical pesticides as an effective, useful alternative for currently used toxic insecticides. Additionally, essential oils of C. flexuosus and C. winterianus and their active ingredients are classified as non-residual insecticides and are eligible for a pesticide registration exemption.
Infestation Rate of the Coffee Berry Borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) in South India Venkatesha, Melally Giddegowda; Kiran, Rudramuni
Jurnal Proteksi Tanaman (Journal of Plant Protection) Vol. 8 No. 1 (2024): June 2024
Publisher : Plant Protection Department, Faculty of Agriculture, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jpt.8.1.1-11.2024

Abstract

The coffee berry borer (CBB), Hypothenemus hampei, is a monophagous insect pest that poses a major threat to coffee production worldwide, causing yield losses of up to 30-50%. India's coffee heartland in the south, responsible for over 90% of the national output, grapples with the threat of CBB infestations. Despite its economic importance and global spread, research on the ecology of CBB in India's traditional coffee-growing regions still needs to be completed. In this study, we investigated the infestation rate of CBB in Coffea arabica and C. canephora plantations at three designated locations at Chikkamagaluru (Karnataka), Thandigudi (Tamil Nadu) and Chundale (Kerala) from south India and samplings was done once a month during three fruiting periods between 2015 and 2018. The three sampled sites showed variable percentages of infestation rates across the sampling period between 4.61±0.73 and 29.60±2.28, with the lowest and highest infestation rates in Thandigudi and Chikkamagaluru, respectively. The increase in CBB infestation towards harvest and variations in pre-brood, brood, and post-brood populations suggest the influence of different stages of fresh coffee berries, favorable agro-climatic conditions, and gaps in management strategies in the three sampled regions.
Co-Authors Kiran, Rudramuni