Abstract
Pruning as a cultural practice has been increasingly used in Southern California avocado orchards. This practice promotes the production of flush growth, which is the preferred food source of avocado thrips (Scirtothrips perseae Nakahara). Currently, most pruning activities take place in January, February or March. To determine when pruning ‘Hass’ avocado least affects fruit set and minimizes avocado fruit relates monthly pruning times in 2002 to the presence of flushing leaves as a food source for avocado thrips, the numbers of immature avocado thrips, and to the 2002 and 2003 fruit set. Pruning between January and May promoted the prolonged presence of flush during fruit set and early fruit development through August and delayed the hardening of the leaves. With the grower's IPM program, which used 4 chemical treatments to suppress avocado thrips, the number of thrips was significantly higher on trees pruned in April than on un-pruned trees, while pruning in January, February or March 2002 did not affect avocado thrips numbers. Pruning in January did not affect fruit set, while pruning in February and March caused significant decreases in the 2002 and 2003 fruit set. These results indicate that in coastal California, pruning in January 2002 was a better option than pruning in February or March 2002. Further studies are suggested before pruning activities can be incorporated into an IPM system for avocado in California.
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Claims 8
Claim · model-written summary
January–May pruning prolonged flush presence during fruit set and early fruit development.
- Taxon
- Avocado
Persea americanat0 - Organ / stage
- fruit set and early fruit developmente0
- Treatment
- Pruning between January and Maye0
- Outcome
- presence of flushe0
- Direction
- prolongede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pruning between January and May promoted the prolonged presence of flush during fruit set and early fruit development through August”
t0“Avocado Pruning Affects”
Claim · model-written summary
January–May pruning delayed leaf hardening.
- Taxon
- AvocadoPersea americanat0
- Treatment
- Pruning between January and Maye0
- Outcome
- hardening of the leavese0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pruning between January and May promoted the prolonged presence of flush during fruit set and early fruit development through August and delayed the hardening of the leaves.”
t0“Avocado Pruning Affects”
Claim · model-written summary
With the IPM program, April-pruned trees had significantly more thrips than unpruned trees.
- Taxon
- avocadoPersea americanae0
- Treatment
- pruned in Aprile0
- Interactor
- avocado thripsScirtothrips perseaee0pest
- Outcome
- number of thripse0
- Direction
- highere0
- Qualifier
- grower's IPM programe0
- Comparator
- un-pruned treese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the grower's IPM program, which used 4 chemical treatments to suppress avocado thrips, the number of thrips was significantly higher on trees pruned in April than on un-pruned trees”
Claim · model-written summary
Pruning in January, February, or March 2002 did not alter avocado thrips numbers.
- Taxon
- avocadoPersea americanae0
- Treatment
- pruning in January, February or March 2002e0
- Interactor
- avocado thripsScirtothrips perseaee0pest
- Outcome
- avocado thrips numberse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pruning in January, February or March 2002 did not affect avocado thrips numbers.”
Claim · model-written summary
January pruning did not affect fruit set.
- Taxon
- AvocadoPersea americanat0
- Treatment
- Pruning in Januarye0
- Outcome
- fruit sete0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pruning in January did not affect fruit set”
t0“Avocado Pruning Affects”
Claim · model-written summary
February pruning significantly reduced fruit set in 2002 and 2003.
- Taxon
- AvocadoPersea americanat0
- Treatment
- pruning in Februarye0
- Outcome
- fruit sete0
- Direction
- decreasese0
- Qualifier
- 2002 and 2003e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pruning in February and March caused significant decreases in the 2002 and 2003 fruit set.”
t0“Avocado Pruning Affects”
Claim · model-written summary
March pruning significantly reduced fruit set in 2002 and 2003.
- Taxon
- AvocadoPersea americanat0
- Treatment
- Marche0
- Outcome
- fruit sete0
- Direction
- decreasese0
- Qualifier
- 2002 and 2003e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pruning in February and March caused significant decreases in the 2002 and 2003 fruit set.”
t0“Avocado Pruning Affects”
Claim · model-written summary
The authors favor January 2002 pruning over February or March in coastal California.
- Taxon
- AvocadoPersea americanat0
- Outcome
- pruning in January 2002 was a better optione0
- Direction
- bettere0
- Comparator
- pruning in February or March 2002e0
- Setting
- coastal Californiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in coastal California, pruning in January 2002 was a better option than pruning in February or March 2002.”
t0“Avocado Pruning Affects”
The same questions in other papers
pruning · yield · Persea americana (avocado)Results differ
2 papers in the same direction as this paper · 10 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 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.