Abstract
Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans. A field trial was conducted during 1997 in Dschang, Cameroon, to assess the effect of Ridomil MZ (8% metalaxyl + 64% mancozeb) sprays, and sanitation (a weekly picking of diseased leaves) on late blight development and yield of five tomato varieties. Plots received Ridomil MZ (2.5 kg/ha) and sanitation singly or combined. Control plots were neither sprayed nor cleaned from diseased leaves. All treatments were applied ten times in a weekly schedule. Late blight intensity was assessed every 7 days and marketable fruit yields were obtained at maturity. Differences in late blight intensity between sanitation and control plots were not significant (P= 0,05). Fungicide treatments were more effective than sanitation in reducing late blight severity. Percent fruit infection was 100% in control or sanitation plots of ARP I366-1, ARP D1, ARP D2, Roma, and no marketable fruits were harvested on these treatments. Late blight was less severe on Mecline compared to the other varieties. Consequently, Mecline out-yielded Roma, ARP I366-1, ARP D1 and ARP D2 varieties. Results suggest that the fungicide-alternative method of late blight control, using sanitation is not as effective in tomato late blight management as appropriate fungicide sprays.
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Claims 7
Claim · model-written summary
Late blight intensity did not differ significantly between sanitation and control plots
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- sanitation (a weekly picking of diseased leaves)e2
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Outcome
- late blight intensitye1
- Comparator
- control plotse1
- Setting
- Dschang, Cameroone3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e0“Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans”
e1“Differences in late blight intensity between sanitation and control plots were not significant (P= 0,05)”
e2“sanitation (a weekly picking of diseased leaves)”
e3“A field trial was conducted during 1997 in Dschang, Cameroon”
Claim · model-written summary
Fungicide treatments were more effective than sanitation in reducing late blight severity
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Fungicide treatmentse1
- Interactor
- Phytophthora infestansPhytophthora infestanse0pathogen
- Outcome
- late blight severitye1
- Direction
- more effectivee1
- Comparator
- sanitatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e0“Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans”
e1“Fungicide treatments were more effective than sanitation in reducing late blight severity”
Claim · model-written summary
Fruit infection was 100% on control or sanitation plots of ARP I366-1, ARP D1, ARP D2 and Roma
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- ARP I366-1, ARP D1, ARP D2, Romae1
- Interactor
- Phytophthora infestansPhytophthora infestanse0pathogen
- Outcome
- Percent fruit infectione1
- Value
- 100%e1
- Qualifier
- control or sanitation plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e0“Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans”
e1“Percent fruit infection was 100% in control or sanitation plots of ARP I366-1, ARP D1, ARP D2, Roma”
Claim · model-written summary
No marketable fruits were harvested on the control or sanitation treatments of the four varieties with 100% fruit infection
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- marketable fruitse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e1“no marketable fruits were harvested on these treatments”
Claim · model-written summary
Late blight was less severe on Mecline than on the other varieties
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Meclinee1
- Interactor
- Phytophthora infestansPhytophthora infestanse0pathogen
- Outcome
- Late blighte1
- Direction
- less severee1
- Comparator
- the other varietiese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e0“Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans”
e1“Late blight was less severe on Mecline compared to the other varieties”
Claim · model-written summary
Mecline out-yielded Roma, ARP I366-1, ARP D1 and ARP D2 in marketable fruit yield
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- Meclinee1
- Outcome
- marketable fruit yieldse2
- Direction
- out-yieldede1
- Comparator
- Roma, ARP I366-1, ARP D1 and ARP D2e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e1“Consequently, Mecline out-yielded Roma, ARP I366-1, ARP D1 and ARP D2 varieties”
e2“marketable fruit yields were obtained at maturity”
Claim · model-written summary
Sanitation is not as effective as appropriate fungicide sprays in managing tomato late blight
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- sanitatione1
- Interactor
- Phytophthora infestansPhytophthora infestanse0pathogen
- Outcome
- tomato late blight managemente1
- Direction
- not as effectivee1
- Comparator
- appropriate fungicide sprayse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Yields”
e0“Tomato (Lycopersicon esculentum) production in Cameroon is usually handicapped by late blight caused by Phytophthora infestans”
e1“Results suggest that the fungicide-alternative method of late blight control, using sanitation is not as effective in tomato late blight management as appropriate fungicide sprays”
The same questions in other papers
sanitation · Phytophthora infestans · Solanum lycopersicum (tomato)Results differ
1 in the opposite direction
- positive
fungicide · Phytophthora infestans · Solanum lycopersicum (tomato)Positive and negative results
7 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
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.