Claim · model-written summary
Aerial sprays reduced numbers of wheat midge larvae more effectively than they reduced the incidence of midge-damaged kernels.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- aerial sprayse0
- Interactor
- wheat midgee0pest
- Outcome
- numbers of midge larvaee1
- Direction
- more effectivee1
- Comparator
- reducing the incidence of midge-damaged kernelse1
Not reportedMaterialGeneCompoundOrgan / stageSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evaluations of individually collected wheat heads and whole plants indicated that several factors may influence the efficacy of aerial sprays against the wheat midge”
e1“In head and plant samples, sprays were more effective at reducing numbers of midge larvae than reducing the incidence of midge-damaged kernels”
Title
R.H. Elliott The Canadian Entomologist 1988. doi:10.4039/ent120941-11
Other claims from this paper (13)
- Observation Evaluations of individual heads overestimated the efficacy of sprays in whole plants.
- Intervention effect Sprays gave more effective midge control and kernel protection in primary heads than in tiller heads.
- Intervention effect Sprays protected kernels better in apical than in basal regions of each head type.
- Association In whole plants, spray efficacy declined as tillering increased.
- Intervention effect The high-volume chlorpyrifos spray gave the best midge control, 95%.
- Intervention effect The high-volume chlorpyrifos spray gave the best kernel protection, 87%.
- Intervention effect The low-volume chlorpyrifos spray followed the high-volume spray in midge control, 87%.
- Intervention effect The low-volume chlorpyrifos spray followed the high-volume spray in kernel protection, 76%.
- Intervention effect The low-volume dimethoate spray followed the high-volume spray in midge control, 66%.
- Intervention effect The low-volume dimethoate spray followed the high-volume spray in kernel protection, 53%.
- Observation Net returns from the three aerial sprays ranged from $62 to $113 Canadian per hectare.
- Observation Long-term benefits of the sprays were probably less favourable.
- Association Reduction of the wheat midge by spraying would negate the benefits of the egg–larval parasite Pirene penetrans.