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- W315024369 abstract "The sugarcane thrips, Fulmekiola serrata Kobus, is a pest of the South African sugarcane industry. One of the strategies to control the pest is by breeding and selecting resistant genotypes. The main objective of this study was to compare different methods of predicting thrips damage to establish a method for resistance screening. Thrips number count and phenotypic assessment of damage were compared. Ninety genotypes were planted in replicated field trials at the Mount Edgecombe and Kearsney research stations. Data were collected for the extent of leaf damage caused by thrips from a three month old crop in January, February and March of the 2009, 2010 and 2012 seasons. One spindle per plot was sampled from the three month old crop to count the number of thrips. Data was analysed for genotype, month and years as fixed effects. Results showed significant differences (P<0.0001) between years and sites for both traits. Significant differences (P<0.0001) exist among genotypes for thrips damage. Although the F values (F=1.61 to 2.81, P<0.0001) for genotypic effect of thrips numbers were significant, they were lower than those for thrips damage (F=5.47 to 7.93, P<0.0001), indicating lower discrimination among genotypes when using thrips numbers. Thrips damage in genotypes was highly correlated (r=0.79 to 0.80) across all site/season combinations when compared with thrips numbers (r=0.31 to 0.43). The parameters indicate that thrips numbers are less reliable for determining genotype differences compared with thrips damage. Thrips damage based on phenotypic symptoms will be recommended for routine resistance screening." @default.
- W315024369 created "2016-06-24" @default.
- W315024369 creator A5010245038 @default.
- W315024369 date "2013-01-01" @default.
- W315024369 modified "2023-09-28" @default.
- W315024369 title "COMPARISON OF METHODS FOR DETERMINING THRIPS (FULMEKIOLA SERRATA) DAMAGE AND IMPLICATIONS FOR RESISTANCE SCREENING" @default.
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