Table 2. Number of cases (75 plants: 3 replications) of common spear rot /crown disease in nursery conditions.

Treatment Accum 1 Accum 2 Reincidence Crown disease CSR/CD (%)
Poor drainage 49 48 121 2 100
Excessive drainage 30 27 91 8 87.5
Base fertilization 41 34 119 10 90
Double fertilization 44 31 127 10 60
Excess of N 38 25 98 10 60
Root pruning 41 28 119 12 83.3
Leaf pruning 9 4 16 1 100
Mechanical damage 34 24 93 10 60
Boron 31 18 50 2 100

Accum 1 = Accumulated number of cases of CSR in the period ignoring reincidence

Accum 2 = Accumulated cases of CSR ignoring the first two evaluations for the treatments of leaf and root prooning.

Reincidence = Reincidence accumulated of plants showing CSR symptoms once or more times

CSR/CD = Percent of plants showing both common spear rot and crown disease symptoms