Free access
Issue
Apidologie
Volume 28, Number 2, 1997
Page(s) 63 - 70
DOI http://dx.doi.org/10.1051/apido:19970202
Apidologie 28 (1997) 63-70
DOI: 10.1051/apido:19970202

A sequential sampling technique for female adult mites of Varroa jacobsoni Oudemans in the sealed worker brood of Apis mellifera ligustica Spin

I. Floris

Istituto di Entomologia agraria, Università degli Studi di Sassari, Via E De Nicola, 07100 Sassari, Italy

Abstract - A method of sequential sampling for estimating the female adult mite population of Varroa jacobsoni in the sealed worker brood of Apis mellifera ligustica Spin, in relation to two hypothetical critical densities (0.05 and 0.1 female adult mite per cell) is proposed. Iwao's patchiness regression method, based on the mean crowding - mean relationship, was used to analyze spatial distribution of the mite and to define a sequential graph or table.


Key words: Varroa jacobsoni / dispersion index / spatial distribution / sequential sampling / sealed worker brood / Apis mellifera ligustica Spin