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Table 3 Effect of BKN20 5%AS on the yield of harvestable shoots of tea

From: Beauveria bassiana: as a potential microbial biocontrol agent for tea mosquito bug, Helopeltis theivora Waterhouse (Hemiptera: Miridae) in Dooars and Darjeeling, India

Treatments

Concentration (ha)

Green leaf yield* (kg/plot)

Processed tea (kg/ha/year)

BKN20 5%AS

600 ml$

2.51cd ± 0.19

390.5 ± 4.25

 

800 ml$

2.55bc ± 0.18

396 ± 4.36

 

1000 ml$

2.61ab ± 0.16

405 ± 4.45

 

1200 ml$

2.63a ± 0.23

408.5 ± 4.21

Beauveria bassiana 1.15% WP

2500 g

2.50de ± 0.29

388 ± 4.19

Thiamethoxam 25%WG

120 g

2.65a ± 0.22

411 ± 4.37

Untreated control

2.43e ± 0.14

378 ± 4.25

F value

 

8.2

15.5

p value

 

0.003

< 0.0001

  1. *Values represent the mean of three replications ± SE, for green leaf yield (obtained from six rounds of leaf plucking after treatments at weekly interval for two consecutive seasons)
  2. $Containing 2 × 107 conidia/ml. Values in the same column followed by the same letter are not significantly different from each other at the 95% confidence interval (p < 0.05) using Tukey’s post-hoc Honestly Significant Difference (HSD) test
  3. Market product