Table 3.

The influence of penconazole and chitin/chitosan-based soil amendments on pathogen severity of pear scab (Venturia pirini) on Pyrus communis ‘Conference’ (pear ‘Conference’) under field conditionsa.

TreatmentLeaf scab severitybFruit scab severitycSPADFV/FMPIABSFruit yield (kg)
Control (water)3.5c1.8b36.4a0.828a7.47ab8.44a
Chitin (1.0%)2.1a1.1a44.1b0.832a9.96c10.10abc
Chitosan (1.0%)2.2a1.0a42.0b0.832a10.1c10.56bc
Crab meal3.0b1.7b41.9b0.830a7.65ab8.92ab
Liquid chitosan2.4a1.3a42.8b0.834a9.07bc8.94ab
Agrinos 5-0-03.5c1.9b37.6a0.832a6.84a9.24abc
Significance of Treatment (T)< 0.001< 0.001< 0.001< 0.445< 0.001< 0.001
  • aNumbers within a column followed by a common letter are not significantly different according to Tukey’s Honest Significant Difference test (P = 0.05).

  • bMean of 50 leaves from 5 trees (10 leaves per tree).

  • cMean of 50 fruits from 5 trees (10 fruits per tree).