Beauveria bassiana strain GHA
Description
Mode of action
Beauveria bassiana strain GHA is a specialized entomopathogenic fungus that functions as a contact bioinsecticide. The fungal spores attach to the insect's cuticle, where they germinate under suitable humidity and enzymatic conditions.
The fungus produces germ tubes that penetrate the exoskeleton, entering the hemocoel. Inside the host, the fungus grows as a mycelium, consuming the insect's tissues and nutrients.
During its development, the fungus secretes specific toxins, such as beauvericin, which paralyze and eventually kill the host insect.
Death occurs due to systemic infection and tissue destruction. After the host dies, the fungus often sporulates on the surface, releasing new conidia into the environment to further infest the pest population.
This strain is highly valued for its broad-spectrum efficacy and its ability to act as a self-sustaining biological control agent within various agricultural ecosystems.
What it targets
This fungal strain is used to manage various high-impact agricultural and horticultural pests that threaten yields and crop quality.
- Thrips
- Whiteflies
- Aphids
- Mites
- Grasshoppers
The strain is particularly effective in greenhouse environments, where managed humidity levels allow for optimal fungal colonization and pest suppression.
It is widely integrated into Integrated Pest Management (IPM) programs to reduce the dependency on synthetic pesticides and to manage insect resistance effectively.
The product is suitable for a diverse range of crops, including vegetables, ornamental flowers, and fruit trees, providing a sustainable alternative for pest regulation.
Rates and timing
Application rates are determined by factors such as pest pressure, crop stage, and the specific application technology used in the field.
Timing is critical; the best results are achieved when applications are initiated at the earliest signs of pest infestation, targeting early larval stages.
Using proper spray equipment to ensure thorough coverage of the canopy is essential, as the spores must come into direct contact with the target insects.
The frequency of applications depends on the environmental conditions and the pest life cycle; repeated applications are often required to maintain control during peak activity.
Compatibility with other pesticides should be verified, as certain fungicides can inhibit the germination and development of the fungal conidia.
Restrictions
The primary constraint for this agent is its reliance on environmental factors, particularly relative humidity, which is vital for initial spore germination.
High levels of ultraviolet radiation can decrease spore viability; therefore, applying the product during early morning or late afternoon is strongly recommended.
Proper storage is essential to maintain the shelf life of the spores, as exposure to extreme temperatures can significantly reduce the efficacy of the product.
Although generally safe for humans and non-target organisms, standard personal protective equipment should be worn to prevent potential irritation during the mixing and spraying process.
The biological nature of the product means that pest mortality is not immediate, requiring a monitoring period to assess the success of the biological treatment effectively.
Status in the European Union
Approved in the EU
- Approved from
- 01.05.2009
- Approval until
- 15.09.2027
- ADI
- Not appl.
- ARfD
- Not appl.
- AOEL
- Not appl.
EU status is for reference only and does not replace national registration in your country.