Spatial Distribution Pattern on Camellia oleifera and Supercooling Point of Ricania sublimbata Overwintering Eggs
Geng Shubao
You Weichen
Hou Heli
Guo Shibao
Zhang Fangmei
Qiao Li
Dong Liping
Abstract：Ricania sublimbata is one of the important insect pests on Camellia oleifera.This study investi-gated the damage characteristics of R.sublimbata on C.oleifera,determined the spatial distribution pattern of overwintering eggs on C.oleifera using 10 aggregation indexes,and also their supercooling point.The results showed that the damage rate of the southern half of the tree was(6.43±0.59)％,which was significantly high-er than that of the northern half[(4.30±0.46)％].The overwintering eggs were arranged in double rows of al-ternate vertical strips in the branches of C.oleifera,and the oviposition scars were covered with a layer of white wax filament;the oviposition scar was(15.95±0.96)mm in length and(2.02±0.06)mm in width.The diameter of laying branches was(2.69±0.05)mm,and there were(19.68±0.96)overwintering eggs on each laying branch.The overwintering eggs was(1.12±0.01)mm in length and(0.51±0.01)mm in width.The su-percooling point and freezing point of overwintering eggs were(-11.61±0.18)℃ and(-10.89±0.17)℃,respectively.The spatial distribution patterns of overwintering eggs in the southern half,the northern half and the whole tree were aggregation distribution.The results of this study could provide data references for predic-tion and green control of R.sublimbata.
Keywords：Ricania sublimbataCamellia oleiferaDamage rateOviposition scarSpatial distribution patternSupercooling point
Publication Date：2026-03-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 120-124 )