Abstract
Field studies were conducted in the forest-steppe zone of the Samara region on the experimental fields of the Volga Research Institute of Breeding and Seed Production in 2013 and 2015. The plots that were not littered (control) and were littered with weed hemp were compared. Due to its high plasticity to weather conditions and well-developed root system, weed hemp has a great competitiveness in relation to winter wheat. The spread of сannabis Ruderalis is focal in nature. Cannabis Ruderalis has contributed to the decrease in aboveground dry mass of wheat in 17-32 %, weight of ears per 13-18 %, the number of productive stems per 16-23 %, grain weight per spike on 4-51 %, mass of 1000 grains for 1-7 %, biological yield grain for 16-20% increase in the length of the ear by 7-10%, and the number of grains per spike by 3-8 %. The influence of weed hemp on the damage of grain by pests was ambiguous. The weather conditions of the spring–summer growing season of winter wheat have a great influence on the damage caused by wheat thrips. In the year with a dry and warm spring (2013), the number of grains damaged by wheat thrips was higher in the clogged areas than in the control. In the year with a wet and warm spring (2015), on the contrary, more wheat thrips-damaged grains were in control. During two years of research, an increase in grains damaged by bread bugs was observed in the clogged areas. Weed hemp has both a direct effect on winter wheat (a decrease in the elements of productivity) and an indirect effect (on the feeding process of wheat thrips and bread bugs).
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Claims 11
Claim · model-written summary
Weed hemp reduced wheat aboveground dry mass by 17-32 %.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Cannabis Ruderalise0
- Interactor
- Cannabis Ruderalis
Cannabis ruderalise0weed - Outcome
- aboveground dry mass of wheate0
- Direction
- decreasee0
- Value
- 17-32 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cannabis Ruderalis has contributed to the decrease in aboveground dry mass of wheat in 17-32 %”
Claim · model-written summary
Weed hemp reduced ear weight by 13-18 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- weight of earse0
- Direction
- decreaseinferrede0
- Value
- 13-18 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weight of ears per 13-18 %”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp reduced productive stems by 16-23 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- number of productive stemse0
- Direction
- decreaseinferrede0
- Value
- 16-23 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of productive stems per 16-23 %”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp reduced grain weight per spike by 4-51 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- grain weight per spikee0
- Direction
- decreaseinferrede0
- Value
- 4-51 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain weight per spike on 4-51 %”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp reduced thousand grain mass by 1-7 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- mass of 1000 grainse0
- Direction
- decreaseinferrede0
- Value
- 1-7 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mass of 1000 grains for 1-7 %”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp reduced biological grain yield by 16-20%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- biological yield graine0
- Direction
- decreaseinferrede0
- Value
- 16-20%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“biological yield grain for 16-20%”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp increased ear length by 7-10%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- length of the eare0
- Direction
- increasee0
- Value
- 7-10%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in the length of the ear by 7-10%”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Weed hemp increased grains per spike by 3-8 %.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- weed hempt0
- Interactor
- weed hempt0weed
- Outcome
- number of grains per spikee0
- Direction
- increaseinferrede0
- Value
- 3-8 %e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of grains per spike by 3-8 %”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
In dry warm 2013, thrips damage was higher in weed-infested plots.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- wheat thripse0pest
- Second interactor
- weed hempt0weed
- Outcome
- number of grains damaged by wheat thripse0
- Direction
- highere0
- Comparator
- controle0
- Setting
- clogged arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the year with a dry and warm spring (2013), the number of grains damaged by wheat thrips was higher in the clogged areas than in the control”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
In wet warm 2015, thrips damage was greater in controls.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- wheat thripse0pest
- Second interactor
- weed hempt0weed
- Outcome
- wheat thrips-damaged grainse0
- Direction
- moree0
- Setting
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the year with a wet and warm spring (2015), on the contrary, more wheat thrips-damaged grains were in control”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
Claim · model-written summary
Bread bug damage increased in weed-infested areas across two years.
- Taxon
- wheatTriticum aestivumt0
- Interactor
- bread bugse0pest
- Second interactor
- weed hempt0weed
- Outcome
- grains damaged by bread bugse0
- Direction
- increasee0
- Setting
- clogged arease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During two years of research, an increase in grains damaged by bread bugs was observed in the clogged areas”
t0“weed hemp (Canabis Ruderalis) on the elements of productivity and grain damage by wheat thrips and cereal bugs in the agrocenosis of winter soft wheat”
The same questions in other papers
Cannabis sativa subsp. sativa · yield · Triticum aestivum (wheat)Positive and negative results
5 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.