ORIGINAL ARTICLE
Fumigant residual impacts of Melaleuca alternifolia (Maid. & Betche) Cheel. (Myrtales: Myrtaceae), terpinen-4-ol, and γ-terpinene on Sitophilus oryzae L. (Coleoptera: Curculionidae) on germination of wheat seeds
1
Department Insect Population Toxicology, Central Agricultural Pesticides Laboratory, Agriculture Research Center, 12618, Giza,
Egypt
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2022-01-26
Acceptance date: 2022-04-25
Online publication date: 2022-08-16
Corresponding author
Seham Mansour Ismail
Department Insect Population Toxicology, Central Agricultural Pesticides Laboratory, Agriculture Research Center, Dokki, Giza, Egypt, Dokki, 21500, Giza, Egypt
Department Insect Population Toxicology, Central Agricultural Pesticides Laboratory, Agriculture Research Center, Dokki, Giza, Egypt, Dokki, 21500, Giza, Egypt
Journal of Plant Protection Research 2022;62(3):258-264
HIGHLIGHTS
- The present work aimed to find new bio-insecticide to protect wheat stored against insect pests during the long storage months
- Terpinen-4-ol and γ-Terpinene were detected as major components of M. alternifolia EO
- The insecticidal activity of the M. alternifolia EO, Terpinen-4-ol and γ-Terpinene was evaluated against S. oryzae
KEYWORDS
TOPICS
ABSTRACT
The fumigation toxicity of Melaleuca alternifolia (Maid. & Betche) Cheel. (Myrtales: Myrtaceae)
essential oil and its major fractions was studied under laboratory conditions against
adults of Sitophilus oryzae L. (Coleoptera: Curculionidae) to protect wheat grains (Triticum
aestivum L.) (Poales: Poaceae) from this global pest that destroys the host plant during
storage. By analyzing M. alternifolia essential oil (EO) using GC/MS terpinen-4-ol and
γ-terpinene were detected as major components. In the fumigation toxicity, M. alternifolia
EO showed the highest toxicity (LC50 = 0.31 μl · l–1 air), followed by terpinen-4-ol
(LC50 = 23.65 μl · l–1 air) and γ-terpinene was the least toxic (LC50 = 43.55 μl · l–1 air). When
tested for their insecticidal activities against S. oryzae in stored wheat, no progeny emerged
after 3 months of treatment with M. alternifolia EO at 10 mg · g–1 or with terpinen-4-ol and
γ-terpinene for 2 months. However, none of these compounds could protect wheat grain
from damage throughout the entire study period (4 months). Interestingly, all tested compounds
at the highest application rate did not show any phytotoxic effects after 4 months
of storage.
RESPONSIBLE EDITOR
Tomasz Klejdysz
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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