Pea aphids (Acyrthosiphon pisum, Homoptera: Aphididae) infected with the fungal pathogen Erynia neoaphidis (Zygomycetes: Entomophthorales) were less sensitive to the aphid alarm pheromone (E)-beta-farnesene than uninfected aphids. Approximately 83% of the healthy aphids and 45% of the infected aphids (2 and 3 days post-inoculation) responded to the alarm pheromone. The percentage of nonresponding aphids increased as the disease progressed. When squeezed (simulated attack) healthy aphids and aphids at an advanced stage of infection elicited a response similar to that of uninfected aphids, suggesting that the alarm pheromone was produced by diseased insects. Aphids infected for 2 or 3 days did not recolonize the upper regions of bean plants after dislodgment. This showed that infected aphids are less active at late stages of infection. The implications of these results are discussed with respect to fungal transmission and biological control. Copyright 1999 Academic Press.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1006/jipa.1999.4856 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Consistency and individuality of honeybee stinging behaviour across time and social contexts.
R Soc Open Sci
January 2025
Department of Biology, University of Konstanz, Konstanz, Germany.
Whether individuals exhibit consistent behavioural variation is a central question in the field of animal behaviour. This question is particularly interesting in the case of social animals, as their behaviour may be strongly modulated by the collective. In this study, we ask whether honeybees exhibit individual differences in stinging behaviour.
View Article and Find Full Text PDFHigh Antennal Expression of and Participate in the Recognition of Alarm Pheromones by Buren.
Insects
January 2025
State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Insects have highly developed olfactory systems in which cytochrome P450s (CYPs) were involved as odor-degrading enzymes throughout the olfactory recognition of odor compounds by insects to avoid continuous stimulation of signaling molecules and thus damage to the olfactory nervous. To understand whether the highly expressed CYPs in the antennae play an olfactory function in worker, in this study, we find six highly expressed antennal CYPs from the transcriptome of . Multiple sequence alignment and phylogenetic analysis divided them into two families: the CYP3 family (, ) and the CYP4 family (, , , ).
View Article and Find Full Text PDFDiversity and role of volatile terpene and terpenoid pheromones in insects.
J Econ Entomol
November 2024
State Key Laboratory of Green Pesticides, Key Laboratory of Green Pesticides and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, China.
Insect pheromones are critical chemical signals that regulate intraspecific behavior and play a key role in the dynamic monitoring and control of pest populations. Historically, research on insect pheromones has primarily focused on lipid-based compounds. However, terpenes and terpenoids, which are widely occurring classes of bioactive compounds, also play significant roles in insect pheromone blends.
View Article and Find Full Text PDFFunctional analysis of (E)-β-farnesene synthases involved in accumulation of (E)-β-farnesene in German chamomile (Matricaria chamomilla L.).
Plant Sci
January 2025
School of Life Science, Anhui Agricultural University, Hefei, China. Electronic address:
German chamomile (Matricaria chamomilla L.) is a traditional medicinal aromatic plant, and the sesquiterpenoids in its flowers have important medicinal value. The (E)-β-farnesene (EβF) is one of the active sesquiterpenoid components and is also a major component of aphid alarm pheromones.
View Article and Find Full Text PDFDifferentiation of Colonies Using Volatile Organic Compound Profiles of Hornets and Nests.
Insects
October 2024
FARMARTEM Group, Department of Analytical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena, s/n, 48940 Leioa, Biscay, Spain.
(Lepeletier, 1836) (Hymenoptera: Vespidae) is a eusocial insect that lives in colonies of hundreds to thousands of individuals, which are divided into castes according to their task: queens, workers, and males. The proper functioning of the colony requires communication between the individuals that make up the colony. Chemical signals (pheromones) are the most common means of communication used by these insects to alarm and differentiate between individuals belonging or not to the colony.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!