Abstract
The thrips Anaphothrips obscurus (Müller), Aptinothrips rufus(Gmelin), A. stylifer Trybom, and Rhipidothrips brunneus Williams, either alone or in mixed populations can inflict economic injury to grasses grown for seed. A. obscurus is a highly mobile and destructive thrips in Oregon grasslands and has a high reproductive potential when conditions are favorable. The cultural practice of burning fields to kill plant pathogens also reduces the number of overwintering thrips but surviving thrips may produce economic injury the following year. The relatively small number of overwintering thrips in certain grasses in early spring produce a type of silvertop by feeding on the inflorescence within the leaf sheath and, thereby, reduce the yield of bentgrass. After the heads emerge from the leaf sheathes, thrips move to the protected environment of the lower leaves and do little damage to the heads. The number of thrips that developed under favorable conditions after heads have emerged from the leaf sheath can destroy 1/2-2/3 of the leaves, which undoubtedly reduces the quality and yield of seed.
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Claims 7
Claim · model-written summary
Four named thrips can economically injure grasses grown for seed.
- Taxon
- grassese0
- Interactor
- Anaphothrips obscurusAnaphothrips obscuruse0pest
- Outcome
- economic injury to grasses grown for seede0
Verbatim
e0“The thrips Anaphothrips obscurus (Müller), Aptinothrips rufus(Gmelin), A. stylifer Trybom, and Rhipidothrips brunneus Williams, either alone or in mixed populations can inflict economic injury to grasses grown for seed.”
Claim · model-written summary
A. obscurus was highly mobile, destructive, and reproductively prolific in favorable conditions.
- Taxon
- Grasst0
- Interactor
- A. obscurusAnaphothrips obscuruse0pest
- Outcome
- highly mobile and destructive thripse0
- Setting
- Oregon grasslandse0
Verbatim
e0“A. obscurus is a highly mobile and destructive thrips in Oregon grasslands and has a high reproductive potential when conditions are favorable.”
t0“Grass Seed”
Claim · model-written summary
Field burning reduced overwintering thrips numbers.
ThripsNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cultural practice of burning fields to kill plant pathogens also reduces the number of overwintering thrips”
t0“Grass Seed”
Claim · model-written summary
Surviving thrips after field burning may cause economic injury the next year.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surviving thrips may produce economic injury the following year”
t0“Grass Seed”
Claim · model-written summary
Overwintering thrips feeding on inflorescences caused silvertop and reduced bentgrass yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relatively small number of overwintering thrips in certain grasses in early spring produce a type of silvertop by feeding on the inflorescence within the leaf sheath and, thereby, reduce the yield of bentgrass.”
Claim · model-written summary
After heads emerged, thrips moved to lower leaves and did little head damage.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the heads emerge from the leaf sheathes, thrips move to the protected environment of the lower leaves and do little damage to the heads.”
t0“Grass Seed”
Claim · model-written summary
Postemergence thrips can destroy 1/2-2/3 of leaves.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of thrips that developed under favorable conditions after heads have emerged from the leaf sheath can destroy 1/2-2/3 of the leaves”
t0“Grass Seed”