Effects of Nutrient Content and Secondary Metabolites in Three Camellia spp.on Feeding of Acalolepta speciosa
To clarify the correlation between the bark contents of different hosts and the damage degree of Acalolepta speciosa,the correlation between the feeding of A.speciosa and the bark contents of Camellia drupif-era,C.oleifera,and C.semiserrata was analyzed.The results indicated that the content of phloem constituents in the three Camellia species was generally higher than that of xylem.A.speciosa showed a clear preference for C.drupifera and C.oleifera.There was no significant correlation between this preference and soluble sugar,re-ducing sugar and total phenol content,but there was a significant positive correlation with tannin content(P<0.05).The higher carbon-to-nitrogen ratio and potential alkaloids in C.semiserrata may explain the lower feeding amounts of A.speciosa on this variety.Furthermore,the phenylalanine content was positively associated with the feeding area(P<0.05).C.drupifera and C.oleifera,with higher lysine,arginine,and histidine lev-els,were preferred by A.speciosa.The feeding behavior of A.speciosa is multifactorial,necessitating further detailed study to elucidate the underlying mechanisms.
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