Claim · model-written summary
Most orchardists applied winter strength limesulphur after adult spraying to destroy eggs.
- Taxon
- Pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communist0 - Treatment
- limesulphur solution at winter strengthe0
- Outcome
- destroy the eggse0
PsyllaNot reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Poirier_Fleurs_et_feuilles.jpg?width=500)
Verbatim
e0“The majority of orchardists, after spraying for the “flies,” applied limesulphur solution at winter strength to destroy the eggs”
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)
- Association Pear psylla adult emergence, egg laying and larval migration occurred at distinct times aligned with pear bud, blossom cluster and bloom events.
- 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 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.