Abstract
Striga hermonthica is a major threat to cereal production in western Kenya and other parts of the world. In laboratory experiments, maize and sorghum showed some resistance to late Striga attachment and parasitism. Field experiments were conducted in 1996 and 1997 in western Kenya to assess the effect of transplanting maize and sorghum, under rain-fed field conditions, on grain yield and Striga parasitism. In transplanted sorghum, Striga emergence was not reduced and sorghum failed to produce grain yield in three out of four seasons. Transplanting maize in all experiments significantly increased grain yield compared to direct seeding. The improved productivity was largely associated with less Striga attachment. Striga densities were considerably lower if maize seedlings were more than 17 d old at transplanting, with decreasing levels of Striga with increasing age of the maize seedlings. Seedlings transplanted before they were 15 d old did not reduce Striga attachment. Transplanting maize under rain-fed conditions is probably only suitable for small areas that are highly infested with Striga, due to its high labor requirements. Under these conditions, crop yield can be more than doubled. An incentive to using this method by small-scale farmers would be that the main input at risk is their own labor. However, the establishment of nurseries and the timing of the transplanting operation require a certain level of farm management that could constrain the adoption of this technique.
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Claims 8
Claim · model-written summary
Maize showed some resistance to late Striga attachment.
- Outcome
- resistance to late Striga attachment and parasitisme0
Zea mays
StrigaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In laboratory experiments, maize and sorghum showed some resistance to late Striga attachment and parasitism.”
Claim · model-written summary
Sorghum showed some resistance to late Striga attachment.
- Outcome
- resistance to late Striga attachment and parasitisme0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In laboratory experiments, maize and sorghum showed some resistance to late Striga attachment and parasitism.”
Claim · model-written summary
Transplanting sorghum did not reduce Striga emergence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In transplanted sorghum, Striga emergence was not reduced”
Claim · model-written summary
Transplanted sorghum failed to yield grain in three of four seasons.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sorghum failed to produce grain yield in three out of four seasons”
e1“In transplanted sorghum”
Claim · model-written summary
Transplanting maize significantly increased grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanting maize in all experiments significantly increased grain yield compared to direct seeding.”
Claim · model-written summary
Improved maize productivity was associated with less Striga attachment.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The improved productivity was largely associated with less Striga attachment.”
e1“Transplanting maize in all experiments”
Claim · model-written summary
Striga density was lower when maize seedlings were older than 17 days at transplanting.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Striga densities were considerably lower if maize seedlings were more than 17 d old at transplanting, with decreasing levels of Striga with increasing age of the maize seedlings.”
Claim · model-written summary
Seedlings transplanted before 15 days did not reduce Striga attachment.
- Treatment
- transplanted before they were 15 d olde0
- Outcome
- Striga attachmente0
- Direction
- did not reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings transplanted before they were 15 d old did not reduce Striga attachment.”
e1“age of the maize seedlings”
The same questions in other papers
transplanting · yield · Zea mays (maize)Results differ
87 papers in the same direction as this paper · 35 in the opposite direction · 7 reporting no difference from an alternative
- positive
- no effect
- no effect
126 papers more in this group
See all 130 papers →transplanting · Striga · SorghumPositive and negative results
1 in the opposite direction
- positive
transplanting · Striga · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- 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.