PR Beetle Grub (Type B)

The ProRep Beetle Grub 2 substrate is a specialised food source for beetle larvae, made from hardwood chips that have been inoculated with white fungus and left to mature. The fungus is essential for breaking down otherwise indigestible compounds, allowing larvae to feed and thrive.
Beetle Grub 2 provides larvae with a more fibrous diet, supporting later growth stages and species that thrive on woody material in their natural environment.
Key Benefits:
• Made from hardwood chips infected with white fungus
• Provides a fibrous, nutrient-rich diet for larvae
• Supports species that require wood-based food sources
• Helps promote strong, healthy development
• Suitable for use in beetle breeding projects
The ProRep Beetle Grub 2 is a vital substrate for supporting the successful rearing of beetle larvae through their growth cycle.
Using ProRep Beetle Grub 1 & Beetle Grub 2 Together
Beetle larvae require a balance of nutrition at different life stages, and this is where ProRep Beetle Grub 1 and Beetle Grub 2 complement each other.
• Beetle Grub 1 (leaf litter based) is best for early-stage larvae or species that naturally feed on softer, decayed plant matter.
• Beetle Grub 2 (hardwood chip based) is ideal for later-stage larvae or species that require a more fibrous, wood-rich diet.
In practice, many breeders mix the two in varying proportions depending on the beetle species. For example, some species thrive on a 50/50 blend throughout development, while others may start on Beetle Grub 1 and transition gradually to Beetle Grub 2 as they grow.
Using the correct balance helps replicate natural conditions, ensuring healthy growth, proper development, and higher success rates in beetle breeding projects.
Using Beetle Grub 1 & 2
• Grub 1: Leaf litter-based, ideal for early-stage larvae or species feeding on softer matter.
• Grub 2: Hardwood-based, suited to later-stage larvae or species needing fibrous diets.
• Mix in different ratios depending on species; some start on Grub 1 and move to Grub 2, while others thrive on a 50/50 blend.
Provides balanced nutrition for healthy growth and development in beetle breeding projects.