Study of mulberry scale, Pseudaulacaspis pentagona (Targioni), resistance in tea plant and the varietal difference

Summary In the field, clear varieatal differences of mulberry scale, Pseudaulacaspis pentagona (targioni) , were observed without annual changes. Then, the following became clear after an investigation of the progeny group of the parent or parents of the resistance strains. 1 . Many of the tea strai...

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Published inBulletin of the Kagoshima Tea Experiment Station (Japan) no. 17
Main Authors Shige, M. (Kagoshima-ken. Tea Research Station, Chiran (Japan)), Uezono, Y, Nagatomo, S, Nonaka, T, Tanaka, T
Format Journal Article
LanguageJapanese
Published 01.01.2004
Subjects
CAMELLIA SINENSIS
DOMINANT GENES
GENETIC RESISTANCE
PEST RESISTANCE
PSEUDAULACASPIS PENTAGONA
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Summary:Summary In the field, clear varieatal differences of mulberry scale, Pseudaulacaspis pentagona (targioni) , were observed without annual changes. Then, the following became clear after an investigation of the progeny group of the parent or parents of the resistance strains. 1 . Many of the tea strains resistant to mulberry scale were from abroad, especially India. 2 . As a test of the progeny, we crossed the resistance strains with the sensitivity strains, and they showed a tendency of separating 1 to 1. Therefore, it was suggested that it was controlled in a few dominant genes with resistance.3 There was no relationship between mulberry scale resistance and infestation. It was considered that it was not evasion from that results. 4 The mulberry scale living on the resistant tea strains experienced stunted growth and a high death rate.The plants with mulberry scale were unable to achieve normal adult size regardless of their sex. The tea resistant strains seemed to be the cause.
Bibliography:2004006618
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ISSN:0911-4785