Abstract
The sweetpotato weevil, Cylas puncticollis Boheman, constitutes a major constraint to sweet potato production and utilization in Africa. Host plant resistance/tolerance, mulching and varying harvesting dates could provide an approach that fits well into an integrated pest management programme of this insect pest. In this study, a trial was conducted to evaluate the effect of host plant, mulching with freshly harvested, dried and chopped up aerial parts of elephant grass (Panicum maximum), and the manipulation of harvesting date, on crop damage by the sweetpotato weevil. The experiment was laid out in a randomized complete split-split plot design with three replications. Four sweet potato varieties (improved variety- kabbia, slipot 2, slipot 3 and slipot 4), four harvesting dates (90, 104, 118 and 132 days after planting (DAP)) and four mulching levels (0t/ha, 1t/ha, 3t/ha and 5t/ha) were used. Data analysis revealed significant differences in C. puncticollis tuber damage and number of tubers produced with respect to mulching. Cylas puncticollis incidence was observed to decrease with increase in mulching level. Also, significant cultivar variation with respect to C. puncticollis tuber damage and the total number of tubers produced were recorded. Slipot 3 and slipot 4 were observed to be significantly less susceptible to the sweetpotato weevil. Harvesting date was also significantly different, with respect to the number of damaged tubers. More tubers were damaged when harvesting was delayed. Hence, using slipot 3 or slipot 4, coupled with mulching at the rate of 3-5t/ha and harvesting at 104 DAP resulted in increased number of tubers and reduced sweetpotato weevil infestation in the field.
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Claims 8
Claim · model-written summary
Cylas puncticollis incidence decreased as mulching level increased.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- mulching levele1
- Interactor
- Cylas puncticollisCylas puncticollise1pest
- Outcome
- Cylas puncticollis incidencee1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The sweetpotato weevil, Cylas puncticollis Boheman, constitutes a major constraint to sweet potato production”
e1“Cylas puncticollis incidence was observed to decrease with increase in mulching level”
Claim · model-written summary
Mulching gave significant differences in C. puncticollis tuber damage and in the number of tubers produced.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- mulchinge2
- Interactor
- C. puncticollisCylas puncticollise2pest
- Outcome
- tuber damage and number of tubers producede2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e2“Data analysis revealed significant differences in C. puncticollis tuber damage and number of tubers produced with respect to mulching”
Claim · model-written summary
Cultivars differed significantly in C. puncticollis tuber damage and in total tuber number.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- cultivare3
- Interactor
- C. puncticollisCylas puncticollise3pest
- Outcome
- tuber damage and the total number of tubers producede3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e3“Also, significant cultivar variation with respect to C. puncticollis tuber damage and the total number of tubers produced were recorded”
Claim · model-written summary
Slipot 3 and slipot 4 were significantly less susceptible to the sweetpotato weevil.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- Slipot 3 and slipot 4e4
- Interactor
- sweetpotato weevil
Cylas formicariuse4pest - Outcome
- susceptible to the sweetpotato weevile4
- Direction
- lesse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e4“Slipot 3 and slipot 4 were observed to be significantly less susceptible to the sweetpotato weevil”
Claim · model-written summary
Harvesting date differed significantly in the number of damaged tubers.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- Harvesting datee5
- Outcome
- number of damaged tuberse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e5“Harvesting date was also significantly different, with respect to the number of damaged tubers”
Claim · model-written summary
More tubers were damaged when harvesting was delayed.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- harvesting was delayede6
- Outcome
- tubers were damagede6
- Direction
- Moree6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e6“More tubers were damaged when harvesting was delayed”
Claim · model-written summary
Slipot 3 or slipot 4 with mulching at 3-5 t/ha and harvesting at 104 DAP increased the number of tubers.
- Taxon
- sweet potatoIpomoea batatase0
- Material
- slipot 3 or slipot 4e7
- Treatment
- coupled with mulching at the rate of 3-5t/ha and harvesting at 104 DAPe7
- Outcome
- number of tuberse7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e7“using slipot 3 or slipot 4, coupled with mulching at the rate of 3-5t/ha and harvesting at 104 DAP resulted in increased number of tubers”
Claim · model-written summary
Slipot 3 or slipot 4 with mulching at 3-5 t/ha and harvesting at 104 DAP reduced sweetpotato weevil infestation in the field.
- Taxon
- sweet potatoIpomoea batatase0
- Treatment
- coupled with mulching at the rate of 3-5t/ha and harvesting at 104 DAPe7
- Interactor
- sweetpotato weevilCylas formicariuse1pest
- Outcome
- sweetpotato weevil infestatione1
- Direction
- reducede1
- Setting
- in the fielde1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutes a major constraint to sweet potato production”
e7“using slipot 3 or slipot 4, coupled with mulching at the rate of 3-5t/ha and harvesting at 104 DAP resulted in increased number of tubers”
e1“and reduced sweetpotato weevil infestation in the field”
The same questions in other papers
mulching · yield · Ipomoea batatas (sweet potato)Positive and negative results
20 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
21 papers more in this group
See all 25 papers →mulching · Cylas formicarius · Ipomoea batatas (sweet potato)Results agree
3 papers in the same direction as this paper
- positive
- 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.