Golan, K. 2003 Observations on the biology and management of Parthenolecanium fletcheri (Cockerell) (Hemiptera, Coccidae).. Sodininkyste ir Darzininkyste 22(3): 164-170.

Notes: Studies on the biology of Fletcher scale, Parthenolecanium fletcheri, were conducted during 1997-98 on Thuja sp. growing in the botanical garden of the Maria Curie-Sklodowska University in Lublin, Poland. Fletcher scale developed one generation per year and the second-instar larvae overwintered. Two year-long studies pointed to the differences existing between the dates of occurrence of particular developmental stages of the species. The date of the appearance of eggs, larvae and females was, to a large extent, dependent on temperature. The optimum date for the chemical control of Fletcher scale was between 14 and 21 July in 1997 and between 3 and 10 July in 1998.