Abstract
Abstract Field experiments were conducted on Fox loamy sand to study the effects of Telone C17, Vorlex, Vorlex CP, dazomet and fenamiphos on populations of Pratylenchus penetrans, soil microflora, on soil enzymes and growth of tobacco. Nematicides were applied on May 10, 1978 except fenamiphos, which was applied on May 16. With the exception of fenamiphos, the nematicide treatments increased the yield of tobacco. Crop index followed the pattern of the yield. No significant difference was observed in the grades of tobacco in all treatments. Chlorine content in the tobacco was significantly lower in the Vorlex, dazomet or fenamiphos treated samples than in the plots treated with Telone C17. The levels of total alkaloids and reducing sugars were similar in the treated and untreated plots. Nematicide treatments other than fenaminophos resulted in significantly lower nematode populations in ridged soils on May 23, June 13, and July 11, and in root samples on June 27 and July 11. The number of nematodes before treatment was more than 850 kg‐1 soil. Plate counts indicated that fungal counts were greater with Vorlex CP on May 23 and with fenamiphos on June 27. A stimulatory effect on the bacterial populations was observed in all fumigant treated samples. Reduced urease activity was found on May 23 in plots treated with Vorlex, while the activity was recovered on June 27. The activity was then stimulated with Vorlex CP treatment. The levels of dehydrogenase were increased with treatments of Vorlex CP, dazomet and fenamiphos on June 27. Nitrification was inhibited by most fumigant treatments on May 23, while inhibition recovered to equal to or greater than that of control on June 27.
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Claims 19
Claim · model-written summary
Nematicides other than fenamiphos increased tobacco yield.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- nematicide treatmentse0
- Outcome
- yield of tobaccoe0
- Direction
- increasede0
- Qualifier
- With the exception of fenamiphose0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“With the exception of fenamiphos, the nematicide treatments increased the yield of tobacco.”
Claim · model-written summary
Crop index followed the tobacco yield pattern.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- Crop indexe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Crop index followed the pattern of the yield.”
Claim · model-written summary
Tobacco grades did not differ significantly across treatments.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- all treatmentse0
- Outcome
- grades of tobaccoe0
- Direction
- No significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“No significant difference was observed in the grades of tobacco in all treatments.”
Claim · model-written summary
Vorlex-treated tobacco had lower chlorine content than Telone C17-treated tobacco.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Vorlexe0
- Outcome
- Chlorine contente0
- Direction
- lowere0
- Comparator
- Telone C17e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorine content in the tobacco was significantly lower in the Vorlex, dazomet or fenamiphos treated samples than in the plots treated with Telone C17.”
Claim · model-written summary
Dazomet-treated tobacco had lower chlorine content than Telone C17-treated tobacco.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- dazomete0
- Outcome
- Chlorine contente0
- Direction
- lowere0
- Comparator
- Telone C17e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorine content in the tobacco was significantly lower in the Vorlex, dazomet or fenamiphos treated samples than in the plots treated with Telone C17.”
Claim · model-written summary
Fenamiphos-treated tobacco had lower chlorine content than Telone C17-treated tobacco.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- fenamiphose0
- Outcome
- Chlorine contente0
- Direction
- lowere0
- Comparator
- Telone C17e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorine content in the tobacco was significantly lower in the Vorlex, dazomet or fenamiphos treated samples than in the plots treated with Telone C17.”
Claim · model-written summary
Total alkaloids and reducing sugars were similar in treated and untreated plots.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- treatede0
- Outcome
- total alkaloids and reducing sugarse0
- Direction
- similare0
- Comparator
- untreated plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“The levels of total alkaloids and reducing sugars were similar in the treated and untreated plots.”
Claim · model-written summary
Nematicides other than fenamiphos lowered nematode populations in ridged soils on three sampling dates.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Nematicide treatmentse0
- Outcome
- nematode populations in ridged soilse0
- Direction
- lowere0
- Qualifier
- May 23, June 13, and July 11e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Nematicide treatments other than fenaminophos resulted in significantly lower nematode populations in ridged soils on May 23, June 13, and July 11”
Claim · model-written summary
Nematicides other than fenamiphos lowered nematode populations in tobacco root samples.
- Taxon
- tobaccoNicotiana tabacumt0
- Organ / stage
- roote0
- Treatment
- Nematicide treatmentse0
- Outcome
- nematode populationse0
- Direction
- lowere0
- Qualifier
- June 27 and July 11e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Nematicide treatments other than fenaminophos resulted in significantly lower nematode populations in ridged soils on May 23, June 13, and July 11, and in root samples on June 27 and July 11.”
Claim · model-written summary
Before treatment, nematode counts exceeded 850 kg‐1 soil.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- number of nematodese0
- Direction
- more thane0
- Value
- 850 kg‐1 soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“The number of nematodes before treatment was more than 850 kg‐1 soil.”
Claim · model-written summary
Vorlex CP increased fungal counts on May 23.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Vorlex CPe0
- Outcome
- fungal countse0
- Direction
- greatere0
- Qualifier
- May 23e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Plate counts indicated that fungal counts were greater with Vorlex CP on May 23”
Claim · model-written summary
Fenamiphos increased fungal counts on June 27.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- fenamiphose0
- Outcome
- fungal countse1
- Direction
- greatere1
- Qualifier
- June 27e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“with fenamiphos on June 27”
e1“fungal counts were greater with Vorlex CP on May 23 and with fenamiphos on June 27.”
Claim · model-written summary
All fumigant treatments stimulated bacterial populations.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- fumigante0
- Outcome
- bacterial populationse0
- Direction
- stimulatorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“A stimulatory effect on the bacterial populations was observed in all fumigant treated samples.”
Claim · model-written summary
Vorlex reduced soil urease activity on May 23.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Vorlexe0
- Outcome
- urease activitye0
- Direction
- Reducede0
- Qualifier
- May 23e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Reduced urease activity was found on May 23 in plots treated with Vorlex”
Claim · model-written summary
Urease activity recovered by June 27.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- activitye0
- Direction
- recoverede0
- Qualifier
- June 27e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“the activity was recovered on June 27”
Claim · model-written summary
Vorlex CP stimulated urease activity subsequently.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- Vorlex CP treatmente0
- Outcome
- activitye0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“The activity was then stimulated with Vorlex CP treatment.”
Claim · model-written summary
Vorlex CP, dazomet, and fenamiphos increased dehydrogenase levels on June 27.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- treatments of Vorlex CP, dazomet and fenamiphose0
- Outcome
- levels of dehydrogenasee0
- Direction
- increasede0
- Qualifier
- June 27e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“The levels of dehydrogenase were increased with treatments of Vorlex CP, dazomet and fenamiphos on June 27.”
Claim · model-written summary
Most fumigants inhibited nitrification on May 23.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- most fumigant treatmentse0
- Outcome
- Nitrificatione0
- Direction
- inhibitede0
- Qualifier
- May 23e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“Nitrification was inhibited by most fumigant treatments on May 23”
Claim · model-written summary
Nitrification inhibition recovered to control level or above by June 27.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- inhibitione0
- Direction
- recoverede0
- Qualifier
- June 27e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“flue-cured tobacco”
e0“inhibition recovered to equal to or greater than that of control on June 27”
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 →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.