Statements (17)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:disease
|
| gptkbp:affects |
pear tree
|
| gptkbp:causedBy |
gptkb:phytoplasma
|
| gptkbp:controls |
removal of infected trees
vector control use of resistant rootstocks |
| gptkbp:firstReported |
1940s
|
| gptkbp:symptom |
leaf yellowing
premature leaf drop tree decline reduced fruit size |
| gptkbp:transmittedBy |
gptkb:pear_psylla
|
| gptkbp:分布地区 |
gptkb:Europe
gptkb:North_America |
| gptkbp:bfsParent |
gptkb:pear_decline_phytoplasma
|
| gptkbp:bfsLayer |
9
|
| https://www.w3.org/2000/01/rdf-schema#label |
pear decline disease
|