Abstract
Abstract Investigations into the effect of soybean cyst nematode (SCN, Heterodera glycines, Ichinoe) on the yield components of soybean [Glycine max (L.) Merr.] have shown that pod numbers are reduced with increasing SCN initial populations (Pi) present in the soil at planting. The main method by which SCN alters pod numbers is through reductions in the number of branches per plant. Foliar applications of boron (B) and B in combination with magnesium (Mg) (B+Mg) increase yield of soybean not infected with SCN by increasing pod number per plant, especially the number of pods on branches. The objective of this research was to determine if foliar applications of B and B+Mg ameliorates the effect of SCN by increasing yield on branches. Field experiments were conducted in 1993 and 1994 in 1 m2 microplots to compare foliar applied B and B+Mg to a control treatment. Foliar applications were made at four intervals spaced throughout soybean reproductive development of Pioneer brand 9391, an SCN susceptible cultivar. There were 12 levels of SCN Pi in 1993 and 11 levels in 1994. For each treatment, including control, grain yield was regressed on SCN Pi. Yield was reduced with increasing SCN Pi in both years, but the rate of decrease did not differ among treatments. In addition, ANOVA of yield components revealed no treatment effects on the number of branches per plant, the number of branch pods per plant, or the total number of pods per plant. Thus, foliar applications of B or B+Mg did not ameliorate the effects of SCN on soybean. Notes Contribution from the Missouri Agricultural Experiment Station. Journal series number 12,964.
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Claims 4
Claim · model-written summary
Soybean yield was reduced with increasing soybean cyst nematode initial population.
- Taxon
- soybean
Glycine maxt0 - Treatment
- increasing SCN Pie1
- Interactor
- SCNe1pathogen
- Outcome
- Yielde1
- Direction
- reducede1
- Setting
- 1 m2 microplotse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield components of soybean plants”
e1“Yield was reduced with increasing SCN Pi in both years”
e6“Field experiments were conducted in 1993 and 1994 in 1 m2 microplots”
Claim · model-written summary
The rate of yield decrease with soybean cyst nematode did not differ between foliar applied boron and boron plus magnesium and the control treatment.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar applied B and B+Mge3
- Interactor
- SCNe1pathogen
- Outcome
- rate of decreasee2
- Direction
- did not differe2
- Comparator
- control treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield components of soybean plants”
e1“Yield was reduced with increasing SCN Pi in both years”
e2“the rate of decrease did not differ among treatments”
e3“compare foliar applied B and B+Mg to a control treatment”
Claim · model-written summary
Foliar boron or boron plus magnesium did not ameliorate the effects of soybean cyst nematode on soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar applications of B or B+Mge4
- Interactor
- SCNe4pathogen
- Outcome
- effects of SCN on soybeane4
- Direction
- did not amelioratee4
- Comparator
- control treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield components of soybean plants”
e3“compare foliar applied B and B+Mg to a control treatment”
e4“Thus, foliar applications of B or B+Mg did not ameliorate the effects of SCN on soybean”
Claim · model-written summary
Foliar boron or boron plus magnesium had no effect on the number of branches per plant, branch pods per plant, or total pods per plant in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- foliar applied B and B+Mge3
- Outcome
- the number of branches per plant, the number of branch pods per plant, or the total number of pods per plante5
- Direction
- no_changeinferrede5
- Comparator
- control treatmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Yield components of soybean plants”
e3“compare foliar applied B and B+Mg to a control treatment”
e5“ANOVA of yield components revealed no treatment effects on the number of branches per plant, the number of branch pods per plant, or the total number of pods per plant”
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