Abstract
Yield loss caused by root lesion nematodes ( Pratylenchus neglectus and P. thornei ) was measured using the nematicide aldicarb (Temik 150GTM) or by correlating yield with initial or final nematode densities. In 1996, rotation trials (1 P. neglectus and 1 P. thornei ) were established with susceptible and moderately resistant wheat varieties and resistant barley and triticale varieties. An intolerant oat variety (cv. Echidna) was planted over all plots in 1997. Nematode densities were 90% ( P. neglectus ) or 95% ( P. thornei ) lower in oat plots following the resistant triticale (cv. Tahara) relative to the susceptible wheat (cv. Machete). In 1997, a significant, negative correlation between both initial and final nematode density and yield was obtained. In wheat variety trials (3 sites) in 1997, a significant, negative correlation was also obtained between mean variety yield and mean final P. neglectus density or mean P. neglectus multiplication rate. Yield loss of up to 20% was calculated from the regression. In all trials, cereal varieties that were more resistant were also more tolerant. In 1996, aldicarb rate trials (1 P. neglectus and 1 P. thornei ) were established to assess the affect of rate and timing of aldicarb application on yield of 2 susceptible/intolerant wheat varieties (cvv. Machete and Janz). Lower rates of aldicarb (=1.5 kg a.i./ha) gave inconsistent nematode control and did not significantly increase yield. Rates =2.5 kg a.i./ha reduced nematode densities by 70–90%, resulting in up to 23% greater yield for Machete. The magnitude of yield loss caused by P. neglectus or P. thornei determined with or without nematicide was similar between trials.
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Claims 12
Claim · model-written summary
Nematode densities were 90% lower in oat plots after resistant triticale than after susceptible wheat, for P. neglectus.
- Taxon
- oat
Avena sativae4 - Treatment
- resistant triticale (cv. Tahara)e4
- Interactor
- P. neglectus
Pratylenchus neglectuse4pest - Outcome
- Nematode densitiese4
- Direction
- lowere4
- Value
- 90%e4
- Comparator
- susceptible wheat (cv. Machete)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e4“Nematode densities were 90% ( P. neglectus ) or 95% ( P. thornei ) lower in oat plots following the resistant triticale (cv. Tahara) relative to the susceptible wheat (cv. Machete)”
Claim · model-written summary
Nematode densities were 95% lower in oat plots after resistant triticale than after susceptible wheat, for P. thornei.
- Taxon
- oatAvena sativae4
- Treatment
- resistant triticale (cv. Tahara)e4
- Interactor
- P. thorneiPratylenchus thorneie4pest
- Outcome
- Nematode densitiese4
- Direction
- lowere4
- Value
- 95%e4
- Comparator
- susceptible wheat (cv. Machete)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e4“Nematode densities were 90% ( P. neglectus ) or 95% ( P. thornei ) lower in oat plots following the resistant triticale (cv. Tahara) relative to the susceptible wheat (cv. Machete)”
Claim · model-written summary
Yield of cereals was negatively correlated with initial and final root lesion nematode density in 1997.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e5“In 1997, a significant, negative correlation between both initial and final nematode density and yield was obtained”
Claim · model-written summary
Mean variety yield of wheat was negatively correlated with mean final P. neglectus density in 1997.
- Taxon
- wheat
Triticum aestivume6 - Interactor
- P. neglectusPratylenchus neglectuse6pest
- Outcome
- mean variety yielde6
- Direction
- negative correlatione6
- Qualifier
- mean final P. neglectus densitye6
- Setting
- 3 sitese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e6“In wheat variety trials (3 sites) in 1997, a significant, negative correlation was also obtained between mean variety yield and mean final P. neglectus density or mean P. neglectus multiplication rate”
Claim · model-written summary
Mean variety yield of wheat was negatively correlated with P. neglectus multiplication rate in 1997.
- Taxon
- wheatTriticum aestivume6
- Interactor
- P. neglectusPratylenchus neglectuse6pest
- Outcome
- mean variety yielde6
- Direction
- negative correlatione6
- Qualifier
- mean P. neglectus multiplication ratee6
- Setting
- 3 sitese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e6“In wheat variety trials (3 sites) in 1997, a significant, negative correlation was also obtained between mean variety yield and mean final P. neglectus density or mean P. neglectus multiplication rate”
Claim · model-written summary
Yield loss of up to 20% in cereals was calculated from the regression.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e7“Yield loss of up to 20% was calculated from the regression”
Claim · model-written summary
More resistant cereal varieties were also more tolerant.
Verbatim
e0“cereal varieties that were more resistant were also more tolerant”
Claim · model-written summary
Lower rates of aldicarb gave inconsistent nematode control in wheat.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Lower rates of aldicarb (=1.5 kg a.i./ha)e2
- Outcome
- nematode controle2
- Qualifier
- inconsistente2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“aldicarb rate trials (1 P. neglectus and 1 P. thornei ) were established to assess the affect of rate and timing of aldicarb application on yield of 2 susceptible/intolerant wheat varieties (cvv. Machete and Janz)”
e2“Lower rates of aldicarb (=1.5 kg a.i./ha) gave inconsistent nematode control and did not significantly increase yield”
Claim · model-written summary
Lower rates of aldicarb did not significantly increase wheat yield.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Lower rates of aldicarb (=1.5 kg a.i./ha)e2
- Outcome
- yielde2
- Direction
- did not significantly increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“aldicarb rate trials (1 P. neglectus and 1 P. thornei ) were established to assess the affect of rate and timing of aldicarb application on yield of 2 susceptible/intolerant wheat varieties (cvv. Machete and Janz)”
e2“Lower rates of aldicarb (=1.5 kg a.i./ha) gave inconsistent nematode control and did not significantly increase yield”
Claim · model-written summary
Aldicarb at 2.5 kg a.i./ha reduced root lesion nematode densities in wheat by 70–90%.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Rates =2.5 kg a.i./hae3
- Interactor
- root lesion nematodest0pest
- Outcome
- nematode densitiese3
- Direction
- reducede3
- Value
- 70–90%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“aldicarb rate trials (1 P. neglectus and 1 P. thornei ) were established to assess the affect of rate and timing of aldicarb application on yield of 2 susceptible/intolerant wheat varieties (cvv. Machete and Janz)”
e3“Rates =2.5 kg a.i./ha reduced nematode densities by 70–90%, resulting in up to 23% greater yield for Machete”
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
Claim · model-written summary
Aldicarb at 2.5 kg a.i./ha gave up to 23% greater yield for Machete wheat.
- Taxon
- wheatTriticum aestivume1
- Material
- Machetee3
- Treatment
- Rates =2.5 kg a.i./hae3
- Outcome
- yielde3
- Direction
- greatere3
- Value
- up to 23%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“aldicarb rate trials (1 P. neglectus and 1 P. thornei ) were established to assess the affect of rate and timing of aldicarb application on yield of 2 susceptible/intolerant wheat varieties (cvv. Machete and Janz)”
e3“Rates =2.5 kg a.i./ha reduced nematode densities by 70–90%, resulting in up to 23% greater yield for Machete”
Claim · model-written summary
The magnitude of yield loss caused by P. neglectus or P. thornei was similar with or without nematicide between trials.
- Taxon
- cerealst0
- Interactor
- P. neglectusPratylenchus neglectuse0pest
- Second interactor
- P. thorneiPratylenchus thorneie0pest
- Outcome
- magnitude of yield losse0
- Qualifier
- similar between trialse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Measuring yield loss in cereals caused by root lesion nematodes (Pratylenchus neglectus and P. thornei) with and without nematicide”
e0“The magnitude of yield loss caused by P. neglectus or P. thornei determined with or without nematicide was similar between trials”
The same questions in other papers
aldicarb · yield · Triticum aestivum (wheat)Positive and negative results
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- positive
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See all 11 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.