Claim · model-written summary
All cover crop extracts initially delayed tomato germination.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- All cover crop extractse0
- Outcome
- germinatione0
- Direction
- delaye0
- Qualifier
- initiale0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
e0“All cover crop extracts resulted in an initial delay in tomato ( Lycopersicon esculentum Mill.) germination, but by 14 DAT, inhibition of germination was apparent only with cowpea extract.”
Title
Michael J. Adler; Carlene A. Chase HortScience 2007. doi:10.21273/hortsci.42.2.289
Other claims from this paper (19)
- Intervention effect At 14 days, goosegrass germination with 5% extracts of all three cover crops exceeded 75% of control.
- Intervention effect Goosegrass germination with 10% cowpea extract was lowest among the three extracts.
- Intervention effect Goosegrass germination with 10% velvetbean extract was intermediate among the three extracts.
- Intervention effect Goosegrass germination with 10% sunn hemp extract was highest among the three extracts.
- Intervention effect Livid amaranth germination declined to ≈50% with cowpea extract.
- Intervention effect Livid amaranth germination declined to ≈50% with sunn hemp extract.
- Intervention effect Livid amaranth germination was lower at 22% with velvetbean extract.
- Intervention effect The 10% extracts suppressed livid amaranth germination more than 5% extracts.
- Intervention effect Bell pepper germination was unaffected by velvetbean extract.
- Intervention effect Bell pepper germination was inhibited more by 5% cowpea extract.
- Intervention effect Bell pepper germination was sensitive by 10% sunn hemp extract.
- Intervention effect Only cowpea extract still inhibited tomato germination by 14 DAT.
- Intervention effect Residues of all three cover crops similarly inhibited goosegrass germination to at most 80% of control.
- Intervention effect Smooth amaranth germination, height and dry biomass were more sensitive to sunn hemp residue than cowpea or velvetbean residue.
- Intervention effect Bell pepper germination, height and dry weight under cover crop residues generally exceeded 90% of control.
- Intervention effect Bell pepper dry weight with cowpea residue was only 78% of control.
- Intervention effect Tomato dry weight with cowpea residue was 76% of control and lower than with velvetbean.
- Intervention effect Tomato dry weight with sunn hemp residue was 69% of control and lower than with velvetbean.
- Observation The authors found more cover-crop phytotoxicity in weeds than crops, with cowpea material affecting species most consistently.