Abstract
Abstract Field screening of maize ( Zea mays L.) and sorghum [ Sorghum bicolor (L.) Moench] can be an efficient means of selecting for resistance to the parasitic plant Striga hermonthica (Del.) Benth. Spatial variability in natural S. hermonthica seed infestations necessitates supplemental infestation for effective field screening. For uniformly heavy levels of infestation, sieved sand has been used as a carrier material for the extremely small S. hermonthica seeds, and a 7‐ to 14‐d waiting period between infestation and planting is often provided to environmentally condition the S. hermonthica seeds for germination and uniform infection. These steps are labor‐intensive, requiring sieving of large amounts of sand and separate infestation and planting times. The objective of this study was to develop alternative soil infestation methods for S. hermonthica seeds that require less labor and produce levels of infection comparable to standard procedures. Nine different methods of soil infestation with S. hermonthica seeds were tested in a screenhouse and in two field locations on maize and sorghum cultivars. To assess effectiveness of the methods, S. hermonthica emergence and host yield were measured. Infestation using sand as a carrier material followed by a 14‐d in situ conditioning period resulted in the greatest amount of infection in the screenhouse. In the field, methods that employed no conditioning period, and thus allowed infestation and planting on the same day, produced levels of infection comparable to methods with 7‐ and 14‐d preplant conditioning periods. The most easily accomplished of these methods used water as the carrier material, producing levels of infection equivalent to methods using sand.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 3
Claim · model-written summary
Sand carrier with a 14‐d in situ conditioning period gave the greatest Striga infection in the screenhouse.
- Treatment
- Infestation using sand as a carrier material followed by a 14‐d in situ conditioning periode2
- Interactor
- Striga hermonthica
Striga hermonthicae1parasite - Outcome
- infectione2
- Direction
- greateste2
- Setting
- screenhousee2
Sorghum
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested in a screenhouse and in two field locations on maize and sorghum cultivars”
e1“resistance to the parasitic plant Striga hermonthica”
e2“Infestation using sand as a carrier material followed by a 14‐d in situ conditioning period resulted in the greatest amount of infection in the screenhouse”
Claim · model-written summary
In the field, methods without a conditioning period gave Striga infection levels comparable to methods with 7‐ and 14‐d preplant conditioning.
- Treatment
- methods that employed no conditioning periode3
- Interactor
- Striga hermonthicaStriga hermonthicae1parasite
- Outcome
- levels of infectione3
- Direction
- no_changeinferrede3
- Comparator
- methods with 7‐ and 14‐d preplant conditioning periodse3
- Setting
- In the fielde3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested in a screenhouse and in two field locations on maize and sorghum cultivars”
e1“resistance to the parasitic plant Striga hermonthica”
e3“In the field, methods that employed no conditioning period, and thus allowed infestation and planting on the same day, produced levels of infection comparable to methods with 7‐ and 14‐d preplant conditioning periods”
Claim · model-written summary
Water as carrier gave Striga infection levels equivalent to sand carrier methods.
- Treatment
- water as the carrier materiale4
- Interactor
- Striga hermonthicaStriga hermonthicae1parasite
- Outcome
- levels of infectione4
- Direction
- no_changeinferrede4
- Comparator
- methods using sande4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested in a screenhouse and in two field locations on maize and sorghum cultivars”
e1“resistance to the parasitic plant Striga hermonthica”
e4“The most easily accomplished of these methods used water as the carrier material, producing levels of infection equivalent to methods using sand”
The same questions in other papers
infection · Striga hermonthica · SorghumPositive and negative results
3 in the opposite direction
- negative
- negative
- negative
infection · Striga hermonthica · Zea mays (maize)Positive and negative results
5 in the opposite direction
- negative
- no effect
- negative
2 papers more in this group
See all 6 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.