Determination of Additional Parameters for
Screening of Different Tea Cultivars against Shot
Hole Borer: Comparative Assessment on Relationship
of Plant Growth Parameters with Galleries in the Stem
Volume 1 - Issue 4
Asanka Tennakoon1*, R Rajapakse1, K Mohotti2, A Mannakkara1, RHK Rathnappriya1, Salinda Sandamal1
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- 1Faculty of Agriculture, University of Ruhuna, Sri Lanka
- 2Tea Research Institute, Talawakelle, Sri Lanka
*Corresponding author:
Asanka Tennakoon, Faculty of Agriculture, University of Ruhuna, Sri Lanka
Received: March 13, 2018;; Published: March 20, 2018
DOI: 10.32474/CIACR.2018.01.000117
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Abstract
Shot whole borer (Xyleborusfornicatus Eichh.) (SHB) is considered as the most serious and economically important pest in tea
plantations in Sri Lanka. Present study was done to determine the parameters for screening of different tea cultivars against SHB.
Prune time assessments on plant growth parameters of plant breeding trials were used to correlate data on galleries per 30cm in
the laboratory bioassay to determine their relationship on SHB infestation in tea. A set of new tea cultivars with known tolerant and
susceptible cultivars were used in the study. The regression analysis indicated that the intermodal length, mean number of prune cuts
and mean prune weight had a significant positive relationship (P<0.05) with SHB infestation and those could be considered as valid
parameters for cultivar screening against SHB in tea. Formulated multiple regression model [πΊππππππππ πππ 30cm units= (β8.27)+(0.1183
π1)+(1.987 π2), where; X1-mean number of prune cuts, X2-internodal length], was significant (P=0.007) and it explained 56.05%
variation of galleries per 30cm (R2=56.05%). Mean number of galleries per 10cm stem had a significant (P<0.05) positive relationship
(0.65) and the model explained 41.62% variation of galleries per foot (R2=41.62%).
Keywords: Cultivar Screening; Plant growth parameters; Shot hole borer; Tea
Abstract|
Introduction|
Material and Methods|
Statistical Analysis|
Results and Discussion|
Prune Time Assessment|
Conclusion|
Acknowledgement|
References|