Abstract
A 3‐year field study examined the effects of 1,3‐dichloropropene or oxamyl on tuber yields in four early‐ and five late‐maturing potato cultivars. The nematicide treatments increased total tuber yield by ≈ 12% for early‐maturing cultivars, but by less than 2% for the late‐maturing cultivars. The treatments reduced the numbers of root lesion nematodes (primarily Pratylenchus penetrans ), which were the dominant plant parasitic nematodes at the site. Covariance analysis indicated that treatment effects on total tuber yield were no longer significant after adjusting for root lesion nematodes in soil at harvest, confirming that these nematodes had a direct effect on the host. As expected, there were significant inverse relationships ( P = 0·05) between total tuber yields and numbers of root lesion nematodes in soil and in roots. However, the application of nematicides in late‐maturing cultivars was found to be of no practical value. Crop production systems designed to reduce or optimize pesticide applications can form one criterion in the development of more environmentally sensitive management strategies. The merit of utilizing chemicals for root lesion nematode control are considered with regard to cultivar maturity.
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Claims 7
Claim · model-written summary
Nematicides increased total tuber yield about 12% in early potato cultivars.
- Taxon
- potato
Solanum tuberosumt0 - Material
- early‐maturing cultivarse0
- Treatment
- nematicide treatmentse0
- Outcome
- total tuber yielde0
- Direction
- increasede0
- Value
- ≈ 12%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nematicide treatments increased total tuber yield by ≈ 12% for early‐maturing cultivars”
t0“potato cultivars”
Claim · model-written summary
Nematicides increased total tuber yield less than 2% in late potato cultivars.
- Taxon
- potatoSolanum tuberosumt0
- Material
- late‐maturing cultivarse0
- Treatment
- nematicide treatmentse0
- Outcome
- total tuber yielde0
- Direction
- increasede0
- Value
- less than 2%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nematicide treatments increased total tuber yield by ≈ 12% for early‐maturing cultivars, but by less than 2% for the late‐maturing cultivars”
t0“potato cultivars”
Claim · model-written summary
Nematicides reduced root lesion nematode numbers.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- treatmentse0
- Interactor
- Pratylenchus penetrans
Pratylenchus penetranse0pest - Outcome
- numbers of root lesion nematodese0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments reduced the numbers of root lesion nematodes (primarily Pratylenchus penetrans )”
t0“potato cultivars”
Claim · model-written summary
Adjustment for soil nematodes at harvest removed statistical significance of the nematicide yield effect.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- adjusting for root lesion nematodes in soil at harveste0
- Interactor
- root lesion nematodese0pest
- Outcome
- treatment effects on total tuber yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment effects on total tuber yield were no longer significant after adjusting for root lesion nematodes in soil at harvest”
t0“potato cultivars”
Claim · model-written summary
Total tuber yield was significantly inversely related to root lesion nematode numbers in soil.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- root lesion nematodese0pest
- Outcome
- total tuber yieldse0
- Direction
- inversee0
- Setting
- soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant inverse relationships ( P = 0·05) between total tuber yields and numbers of root lesion nematodes in soil and in roots”
t0“potato cultivars”
Claim · model-written summary
Total tuber yield was significantly inversely related to root lesion nematode numbers in roots.
- Taxon
- potatoSolanum tuberosumt0
- Organ / stage
- rootse0
- Interactor
- root lesion nematodese0pest
- Outcome
- total tuber yieldse0
- Direction
- inversee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant inverse relationships ( P = 0·05) between total tuber yields and numbers of root lesion nematodes in soil and in roots”
t0“potato cultivars”
Claim · model-written summary
Nematicide application in late maturing cultivars had no practical value.
- Taxon
- potatoSolanum tuberosumt0
- Material
- late‐maturing cultivarse0
- Outcome
- application of nematicides in late‐maturing cultivars was found to be of no practical valuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of nematicides in late‐maturing cultivars was found to be of no practical value”
t0“potato cultivars”
The same questions in other papers
insecticide · yield · Solanum tuberosum (potato)Results differ
21 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
28 papers more in this group
See all 32 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.