Claim · model-written summary
Pear psylla adult emergence, egg laying and larval migration occurred at distinct times aligned with pear bud, blossom cluster and bloom events.
- Taxon
- pear tree
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Pyrus communise0 - Organ / stage
- budse0
- Outcome
- emergence of adults from winter quarters, deposition of eggs and migration of larvaee0
PsyllaNot reportedMaterialGeneCompoundSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“emergence of adults from winter quarters, deposition of eggs and migration of larvae occur with very little intermingling at di8tinct time prriod8 and arc, to a large degree, coincident respectively with certain life events of the pear tree, as the swelling of the buds, development of the blossom clusters, and opening of blossoms”
t0“Pear Psylla”
Title
The Susceptibility of Adults and Eggs of Pear Psylla to Spraying Mixtures
P. J. Parrott; H. E. Hodgkiss Journal of Economic Entomology 1912. doi:10.1093/jee/5.2.193a
Other claims from this paper (8)
- Observation Pear psylla at each life stage was sensitive to particular spraying mixtures.
- Intervention effect A single spray treatment appeared capable of protecting orchards by killing adults, eggs or nymphs.
- Intervention effect Growers eliminated psylla by spraying adults with miscible oils.
- Intervention effect Growers eliminated psylla by spraying adults with home-made emulsions.
- Intervention effect Growers eliminated psylla by spraying adults with commercial nicotine preparations.
- Observation Most orchardists applied winter strength limesulphur after adult spraying to destroy eggs.
- Observation Few plantings needed a third nicotine spray against young nymphs.
- Recommendation The authors conclude that knowledge of insect stages, seasonal activity and thorough spraying are key to psylla control.