Abstract
Field experiments were conducted in 1973 and 1974 on Fox loamy sand to study the effects of Telone (1,3-dichloropropene and related C 3 hydrocarbons), Telone C (1,3-dichloropropene and related C 3 hydrocarbons 85%, and chloropicrin 15%), Vorlex (1,3-dichloropropene and related C 3 hydrocarbons 80%, and methyl isothiocyanate 20%), and the non-fumigant nematicide oxamyl (methyl N′,N′-dimethyl-N-[(methyl-carbamoyl)oxy]-1-thiooxamimidate) on soil nitrifying bacteria, soil nitrogen, and Pratylenchus penetrans (Cobb) Filip, and Stek. 1941 in flue-cured tobacco. Chloropicrin and triazophos (1-phenyl-3-(0-0-diethylthionophosphoryl)-1, 2, 4-triazole), a non-fumigant, were also included in 1974. Soil treated with fumigant nematicides was higher in NH 4 + -N than untreated soil or soil treated with non-fumigant nematicides. Lower levels of NO 3 − -N were found in the soil 37 days after fumigation with Telone or Telone C and 28 days with Vorlex. Fumigant nematicides increased total mineralization, (NH 4 + + NO 3 − )-N, of organic nitrogen in the soil; the effect lasted longer with Telone C and chloropicrin. Nitrosomonas spp. were higher in Telone- or Telone C-treated plots at 4 wk after fumigation and higher in all nematicide plots at 8 wk. Nitrobacter spp. were higher with Vorlex and oxamyl than in the check plots at 4, 6, and 8 wk after fumigation. Nematicides reduced the population of P. penetrans in the soil throughout the season in 1973 but control was less consistent in 1974. Oxamyl and triazophos gave good control of nematodes in roots of flue-cured tobacco. All nematicides tested gave an increase in yield of tobacco in 1973 but no significant increases were obtained in 1974.
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Claims 13
Claim · model-written summary
Soil treated with fumigant nematicides had higher NH4+-N than untreated soil in flue-cured tobacco field experiments.
Verbatim
e0“1941 in flue-cured tobacco”
e1“Soil treated with fumigant nematicides was higher in NH 4 + -N than untreated soil”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Telone or Telone C lowered soil nitrate-N 37 days after fumigation in flue-cured tobacco field experiments.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Telone or Telone Ce1
- Outcome
- levels of NO 3 − -Ne1
- Direction
- Lowere1
- Value
- 37 dayse1
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e1“Lower levels of NO 3 − -N were found in the soil 37 days after fumigation with Telone or Telone C and 28 days with Vorlex”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Vorlex lowered soil nitrate-N 28 days after fumigation in flue-cured tobacco field experiments.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Vorlexe1
- Outcome
- levels of NO 3 − -Ne1
- Direction
- Lowere1
- Value
- 28 dayse1
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e1“Lower levels of NO 3 − -N were found in the soil 37 days after fumigation with Telone or Telone C and 28 days with Vorlex”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Fumigant nematicides increased total mineralization of organic nitrogen in the soil.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Fumigant nematicidese3
- Outcome
- total mineralizatione3
- Direction
- increasede3
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e3“Fumigant nematicides increased total mineralization”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
The effect of Telone C and chloropicrin on soil nitrogen lasted longer than that of other fumigants.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Telone C and chloropicrine4
- Outcome
- the effecte4
- Direction
- longere4
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e4“the effect lasted longer with Telone C and chloropicrin”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Nitrosomonas spp. were higher in Telone- or Telone C-treated plots at 4 weeks after fumigation.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Telone- or Telone C-treated plotse5
- Outcome
- Nitrosomonas spp.e5
- Direction
- highere5
- Value
- 4 wke5
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e5“Nitrosomonas spp. were higher in Telone- or Telone C-treated plots at 4 wk after fumigation and higher in all nematicide plots at 8 wk”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Nitrosomonas spp. were higher in all nematicide plots at 8 weeks after fumigation.
- Taxon
- flue-cured tobaccoe0
- Treatment
- all nematicide plotse5
- Outcome
- Nitrosomonas spp.e5
- Direction
- highere5
- Value
- 8 wke5
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e5“Nitrosomonas spp. were higher in Telone- or Telone C-treated plots at 4 wk after fumigation and higher in all nematicide plots at 8 wk”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Vorlex and oxamyl raised Nitrobacter spp. above the check plots at 4, 6 and 8 weeks after fumigation.
Verbatim
e0“1941 in flue-cured tobacco”
e6“Nitrobacter spp. were higher with Vorlex and oxamyl than in the check plots at 4, 6, and 8 wk after fumigation”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Nematicides reduced the population of P. penetrans in the soil throughout the 1973 season.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Nematicidese7
- Interactor
- P. penetrans
Pratylenchus penetranse7pest - Outcome
- population of P. penetrans in the soile7
- Direction
- reducede7
- Qualifier
- throughout the season in 1973e7
- Setting
- Field experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1941 in flue-cured tobacco”
e7“Nematicides reduced the population of P. penetrans in the soil throughout the season in 1973 but control was less consistent in 1974”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Nematicide control of P. penetrans was less consistent in 1974.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Nematicidese7
- Interactor
- P. penetransPratylenchus penetranse7pest
- Outcome
- controle7
- Direction
- less consistente7
- Qualifier
- in 1974e7
- Setting
- Field experimentse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1941 in flue-cured tobacco”
e7“Nematicides reduced the population of P. penetrans in the soil throughout the season in 1973 but control was less consistent in 1974”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
Oxamyl and triazophos gave good control of nematodes in the roots of flue-cured tobacco.
- Taxon
- flue-cured tobaccoe0
- Treatment
- Oxamyl and triazophose4
- Outcome
- control of nematodes in rootse4
- Direction
- goode4
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e4“Oxamyl and triazophos gave good control of nematodes in roots of flue-cured tobacco”
Claim · model-written summary
All nematicides tested increased tobacco yield in 1973.
- Taxon
- flue-cured tobaccoe0
- Treatment
- All nematicides testede3
- Outcome
- yield of tobaccoe3
- Direction
- an increasee3
- Qualifier
- in 1973e3
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e3“All nematicides tested gave an increase in yield of tobacco in 1973 but no significant increases were obtained in 1974”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
Claim · model-written summary
All nematicides tested gave no significant increase in tobacco yield in 1974.
- Taxon
- flue-cured tobaccoe0
- Treatment
- All nematicides testede3
- Outcome
- yield of tobaccoe3
- Direction
- no significant increasese3
- Qualifier
- in 1974e3
- Setting
- Field experimentse2
Not reportedComparator
Verbatim
e0“1941 in flue-cured tobacco”
e3“All nematicides tested gave an increase in yield of tobacco in 1973 but no significant increases were obtained in 1974”
e2“Field experiments were conducted in 1973 and 1974 on Fox loamy sand”
The same questions in other papers
insecticide · yield · Nicotiana tabacum (tobacco)Positive and negative results
4 papers in the same direction as this paper · 4 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
6 papers more in this group
See all 10 papers →insecticide · Pratylenchus penetrans · Nicotiana tabacum (tobacco)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.