Abstract
A two year study was conducted from 2000-2002 to evaluate the use of overhead sprinkler irrigation for suppressing thrips populations in romaine lettuce. Specifically we looked at how the duration and frequency of sprinkler irrigation use reduced adult and larval populations following various irrigation applications employed specifically for thrips suppression. We also evaluated combinations of insecticide spray regimes, used in association with sprinkler irrigation runs, for suppressing thrips populations in both fall and spring seasons. The results of the study demonstrated that overhead sprinkler irrigation has the ability to suppress thrips populations in romaine lettuce. At best, we experienced about 50% population reduction using only sprinkler irrigation compared with the untreated control during these trials. Sprinkler ruins of durations of > 4 hrs and more than 4 cm of water appeared to provide the minimal necessary for suppression. Furthermore, sprinkle runs of 2 or 3 times weekly appeared to provide the most consistent suppression. In contrast, insecticide sprays consistently provided >80% suppression and provided higher yielding and better quality lettuce than sprinklers. The use of sprinkler irrigation, in addition to insecticide sprays did not significantly improve thrips suppression or yields. However, sprinkler irrigation is being used season long in some romaine fields and in organic production and should be of benefit for thrips suppression, particularly in organic systems where effective insecticide alternatives are not currently available.
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Claims 8
Claim · model-written summary
Sprinklers reduced thrips populations about 50% versus untreated control.
- Taxon
- Romaine Lettuce
Lactuca sativa var. longifoliat0 - Treatment
- sprinkler irrigatione0
- Outcome
- population reductione0
- Direction
- reductione0
- Value
- about 50%e0
- Comparator
- untreated controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“about 50% population reduction using only sprinkler irrigation compared with the untreated control”
t0“Romaine Lettuce”
Claim · model-written summary
Runs over four hours and four centimeters of water were the minimum for suppression.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Outcome
- minimal necessary for suppressione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sprinkler ruins of durations of > 4 hrs and more than 4 cm of water appeared to provide the minimal necessary for suppression.”
t0“Romaine Lettuce”
Claim · model-written summary
Two or three sprinkler runs weekly gave the most consistent suppression.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Outcome
- most consistent suppressione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sprinkle runs of 2 or 3 times weekly appeared to provide the most consistent suppression.”
t0“Romaine Lettuce”
Claim · model-written summary
Insecticide sprays provided over 80% thrips suppression.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Outcome
- suppressione0
- Value
- >80%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insecticide sprays consistently provided >80% suppression”
t0“Romaine Lettuce”
Claim · model-written summary
Insecticide sprays produced higher yielding lettuce than sprinklers.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Treatment
- insecticide sprayse0
- Outcome
- yieldinge0
- Direction
- highere0
- Comparator
- sprinklerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insecticide sprays consistently provided >80% suppression and provided higher yielding and better quality lettuce than sprinklers.”
t0“Romaine Lettuce”
Claim · model-written summary
Insecticide sprays produced better quality lettuce than sprinklers.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Treatment
- insecticide sprayse0
- Outcome
- quality lettucee0
- Direction
- bettere0
- Comparator
- sprinklerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“insecticide sprays consistently provided >80% suppression and provided higher yielding and better quality lettuce than sprinklers.”
t0“Romaine Lettuce”
Claim · model-written summary
Adding sprinkler irrigation to insecticide sprays did not significantly improve thrips suppression.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Treatment
- sprinkler irrigation, in addition to insecticide sprayse0
- Outcome
- thrips suppressione0
- Direction
- did not significantly improvee0
- Comparator
- insecticide sprayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sprinkler irrigation, in addition to insecticide sprays did not significantly improve thrips suppression or yields.”
t0“Romaine Lettuce”
Claim · model-written summary
Adding sprinkler irrigation to insecticide sprays did not significantly improve yields.
- Taxon
- Romaine LettuceLactuca sativa var. longifoliat0
- Treatment
- sprinkler irrigation, in addition to insecticide sprayse0
- Outcome
- yieldse0
- Direction
- did not significantly improvee0
- Comparator
- insecticide sprayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sprinkler irrigation, in addition to insecticide sprays did not significantly improve thrips suppression or yields.”
t0“Romaine Lettuce”
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