Abstract
Spider mites are the most destructive of the economic pests found on soybean plants in our hot interior valleys. Destructive species are the two-spotted mite, Tetranychus urticae K., and the Pacific mite, T. pacificus McG. High population densities of several hundred to over a thousand per leaflet may build up. The light to moderate white-stippled type of injury intensifies so that leaves turn yellowish, then brown, and drop prematurely. This causes a reduction of pod set and yield of seed. The studies have indicated that mite numbers should be kept at or below 4 to 6 per unit count to obtain any sort of satisfactory seed yield. After pod set commences, it appears necessary to have some type of mite control in or on the soybean plants or serious damage and seed loss will occur. Superior mite control has been obtained by chiseling a granular pesticide, such as Thimet, into the soil at planting time and again as a side-dressing in the seedling stage. Kelthane has afforded the best control of the foliage sprays tested. Trithion was fair but multiple sprays were needed. Pesticides discussed in this article have not been registered for use on soybeans and are not recommended for use at this time.
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Claims 9
Claim · model-written summary
Spider mite populations on soybean can reach several hundred to over a thousand per leaflet.
- Taxon
- soybeans
Glycine maxt0 - Outcome
- population densitiese0
- Value
- several hundred to over a thousand per leaflete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High population densities of several hundred to over a thousand per leaflet may build up.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Spider mite injury causes soybean leaves to yellow, brown, and drop prematurely.
- Taxon
- soybeansGlycine maxt0
- Interactor
- Spider mitesTetranychidaet0pest
- Outcome
- leaves turn yellowish, then brown, and drop prematurelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The light to moderate white-stippled type of injury intensifies so that leaves turn yellowish, then brown, and drop prematurely.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Spider mite injury reduces soybean pod set and seed yield.
- Taxon
- soybeansGlycine maxt0
- Interactor
- Spider mitesTetranychidaet0pest
- Outcome
- pod set and yield of seede0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This causes a reduction of pod set and yield of seed.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Mite numbers of at most 4 to 6 per unit count were indicated as necessary for satisfactory soybean seed yield.
- Taxon
- soybeansGlycine maxt0
- Interactor
- Spider mitesTetranychidaet0pest
- Outcome
- satisfactory seed yielde0
- Value
- 4 to 6 per unit counte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mite numbers should be kept at or below 4 to 6 per unit count to obtain any sort of satisfactory seed yield”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Mite control was recommended after soybean pod set to avert damage and seed loss.
- Taxon
- soybean plantsGlycine maxe0
- Organ / stage
- pod sete0
- Interactor
- mitee0pest
- Outcome
- mite controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After pod set commences, it appears necessary to have some type of mite control in or on the soybean plants or serious damage and seed loss will occur.”
Claim · model-written summary
Chiseled granular pesticide at planting and seedling side dressing gave superior soybean mite control.
- Taxon
- soybeansGlycine maxt0
- Treatment
- chiseling a granular pesticide, such as Thimet, into the soil at planting time and again as a side-dressing in the seedling stagee0
- Interactor
- mitee0pest
- Outcome
- mite controle0
- Direction
- Superiore0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Superior mite control has been obtained by chiseling a granular pesticide, such as Thimet, into the soil at planting time and again as a side-dressing in the seedling stage.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Kelthane provided the best control among tested soybean foliage sprays.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Kelthanee0
- Outcome
- controle0
- Direction
- beste0
- Comparator
- foliage sprays testede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kelthane has afforded the best control of the foliage sprays tested.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
Trithion gave fair soybean mite control but needed multiple sprays.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Trithione0
- Outcome
- faire0
- Qualifier
- multiple sprays were needede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trithion was fair but multiple sprays were needed.”
t0“Spider mites on soybeans …injury and control”
Claim · model-written summary
The discussed pesticides were not recommended for soybean use because they were unregistered.
- Taxon
- soybeansGlycine maxe0
- Outcome
- not recommended for usee0
- Qualifier
- have not been registerede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pesticides discussed in this article have not been registered for use on soybeans and are not recommended for use at this time.”
The same questions in other papers
sowing time · control · Glycine max (soybean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
insecticide · control · Glycine max (soybean)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
3 papers more in this group
See all 7 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.