Claim · model-written summary
Few plantings needed a third nicotine spray against young nymphs.
- Taxon
- Pear
_Poirier_Fleurs_et_feuilles.jpg?width=60)
Pyrus communist0 - Treatment
- nicotine spraye0
- Outcome
- kill the young nymphse0
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“In only a few plantings was it necessary to make a third treatment with a nicotine spray to kill the young nymphs”
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 Most orchardists applied winter strength limesulphur after adult spraying to destroy eggs.
- Recommendation The authors conclude that knowledge of insect stages, seasonal activity and thorough spraying are key to psylla control.