Comparing data on the reproduction of Varroa destructor

Area of Science:

• Apiculture
• Parasitology
• Entomology

Background:

• Honey bee (Apis mellifera) resistance to the parasitic Varroa destructor mite is crucial for colony survival.
• Assessing Varroa destructor reproductive success is key to understanding honey bee resistance, but inconsistent methodologies hinder data comparison.

Purpose of the Study:

• To standardize the measurement of Varroa destructor reproductive success in honey bee brood.
• To compare mite reproductive rates across different bee populations and geographic locations using a reliable method.

Main Methods:

• Utilized a recently developed technique for reconstructing mite families within older worker bee brood.
• Analyzed approximately 1,000 Varroa destructor females across three studies in Brazil, Mexico, and England.
• Defined and measured the 'effective reproduction rate' as the number of viable, mated adult females per invading female in singly infested cells.

Main Results:

• The effective reproduction rate varied significantly by location: 0.64 in Brazil (Africanized bees), 0.73 in Mexico (Africanized bees), and 1.01 in England (European bees).
• The 'effective reproduction rate' in worker brood proved to be an objective and useful metric for comparing mite reproductive success.

Conclusions:

• Standardizing Varroa destructor reproduction assessment techniques is essential for comparable and more useful scientific data.
• Geographic location and bee population (Africanized vs. European) influence Varroa destructor reproductive success.