What are biocontrol agents?
Biocontrol agents are organisms, or material derived from nature, which are used to manage pest problems.
They are often grouped into four main types of biocontrol agents:
- Macrobials are insects, mites and beneficial nematodes that when released will parasitize and feed on pests.
- Microbials contain bacteria, fungi, viruses and other microorganisms or their metabolites or cell fragments that have the capacity to kill pests or outcompete and prevent diseases.
- Semiochemicals are message-bearing compounds produced by an animals or plants that can be used to change and disrupt a pest’s normal behaviour.
- Natural substances obtained from plants, minerals and animals can have antimicrobial, insecticidal or pest repellent activity.
What are macrobials?
Macrobials, also known as invertebrate biocontrol agents, are natural enemies of pests. They include mites, insect predators, parasitioids and entomopathogenic (insect-killing) nematodes (or EPNs).
Useful background information on some key pests and their management with macrobial biocontrol agents can be found in the Applied Bionomics Bio-control Handbook. Some examples are provided below:
Examples of natural enemies
- Amblyseius swirskii: The predatory mite A. swirskii is one of the most successful commercial natural enemies in covered crops. It is a generalist predator and is used commercially to control the major greenhouse pests; thrips, whiteflies and mites.
- More information regarding this natural enemy can be found in the BioProtection Portal blog.
- An example of a successful application of the A. swirskii can be illustrated with a case study from Spain, where it has been used to control pests in honey melon, and also in aubergine production.
- Watch a video from Bionema to see how the predator A. swirskii actively manages the whitefly pest in the glasshouse.
Examples of entomopathogenic nematodes
- Steinernema carpocapsae utilizes an “ambush” strategy, waiting near the soil surface for target hosts
- Heterorhabditis bacteriophora has a “cruiser” strategy, seeking out its target.
- A successful example of the use of beneficial nematodes in the UK is the control of vine weevil in strawberries.
What are microbials?
Microbials are micro-organisms, including bacteria, fungi and viruses and may also include their metabolites or fragments of cells.
Examples of fungal biocontrol agents
- Trichoderma is a fungal bioprotection agent with multiple modes of action. Find out more about Trichoderma on the BioProtection Portal blog.
- Green Muscle™ is based on a specific isolate of a fungus called Metarhizium acridum which attacks locusts and grasshoppers. Find out more about Green Muscle on the CABI website.
Examples of bacterial bioprotection agents
- Coming soon
Examples of virus bioprotection agents
- Coming soon
What are semiochemicals?
Semiochemicals are chemicals emitted by organisms which act inter- or intra-specifically as a means of communication. They can act as attractants or repellants and have a specific, non-toxic mode of action.
Examples of semiochemicals
- Coming soon
What are natural substances?
Natural substances are those materials derived from nature, or when synthesised are indistinguishable from the natural material.
Examples of natural substances
- Coming soon
Using natural pest control on your coffee crops – what are the benefits and how do you do it? Our guide takes you through the steps from start to finish to help you start using safer pest control.
Die Lagerung, Handhabung, und Anwendung von biologischen Verfahren im Pflanzenschutz kann entscheidend sein für die Wirksamkeit eines Produktes. Hier auf dem Portal finden Sie eine Auswahl an Ressourcen, die es Ihnen ermöglicht die Effizienz dieser Produkte in ihrem Produktionssystem zu maximieren.
Ihren Schädling korrekt zu identifizieren ist entscheidend um effektive Gegenmassnahmen zu ergreifen. Hier geben wir Hilfestellung um Ihnen bei der Bestimmung von Schädlingen zu helfen, sowie potentiell auch ihre Fähigkeiten in diesem Bereich zu erweitern.
Ein nachhaltigerer Ansatz zur Bekämpfung von Schädlingen in Landwirtschaft und Umwelt ist die biologische Schädlingsbekämpfung. Hier erklären wir allgemein die Definition der biologischen Schädlingsbekämpfung und deren verschiedenen Ansätze.