Abstract
In the years 2001 – 2002 at the Department of Pomology at the Agricultural University of Poznan the investigations were carried out on 8-9 year old peach trees of ‘Reliance’ and on 26-27 year old apple trees ‘Idared’ on the effectiveness of the protective spraying with HELP (mixture based on vitamin E and C with glicerol) against low temperature damages of flower buds, flowers and fruitlets. The spraying was applied 24, 42 or 44 hours before the frosts occurred. In the years of the experiment the natural spring frosts did not occur in the area of Poznan. Therefore, frost resistance tests were all done in laboratory conditions. The 165 tests included various HELP concentrations, time of spraying prior to the frost occurrance and the developmental stage of the plants. In 52% of tests carried out the protective effect of spraying was proved. The spraying with 4% HELP, done 24, 42 or 44 hours before low temperature occurred, increased the survival of flowers and fruitlets in 6-36% in peach trees and 2-31% in apple trees in comparison to the control samples. These results, however, need confirmation in the natural conditions in the orchard.
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Claims 3
Claim · model-written summary
Spraying with 4% HELP before low temperature increased flower and fruitlet survival in peach trees by 6-36% compared with control samples.
- Taxon
- peach trees
Prunus persicae1 - Material
- ‘Reliance’e2
- Organ / stage
- flowers and fruitletse1
- Treatment
- spraying with 4% HELPe1
- Outcome
- survival of flowers and fruitletse1
- Direction
- increasede1
- Value
- 6-36%e1
- Qualifier
- need confirmation in the natural conditionse3
- Comparator
- control samplese1
- Setting
- laboratory conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The spraying with 4% HELP, done 24, 42 or 44 hours before low temperature occurred, increased the survival of flowers and fruitlets in 6-36% in peach trees and 2-31% in apple trees in comparison to the control samples”
e2“investigations were carried out on 8-9 year old peach trees of ‘Reliance’ and on 26-27 year old apple trees ‘Idared’”
e3“These results, however, need confirmation in the natural conditions in the orchard”
e4“frost resistance tests were all done in laboratory conditions”
Claim · model-written summary
Spraying with 4% HELP before low temperature increased flower and fruitlet survival in apple trees by 2-31% compared with control samples.
- Taxon
- apple trees
Malus domesticae1 - Material
- ‘Idared’e2
- Organ / stage
- flowers and fruitletse1
- Treatment
- spraying with 4% HELPe1
- Outcome
- survival of flowers and fruitletse1
- Direction
- increasede1
- Value
- 2-31%e1
- Qualifier
- need confirmation in the natural conditionse3
- Comparator
- control samplese1
- Setting
- laboratory conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The spraying with 4% HELP, done 24, 42 or 44 hours before low temperature occurred, increased the survival of flowers and fruitlets in 6-36% in peach trees and 2-31% in apple trees in comparison to the control samples”
e2“investigations were carried out on 8-9 year old peach trees of ‘Reliance’ and on 26-27 year old apple trees ‘Idared’”
e3“These results, however, need confirmation in the natural conditions in the orchard”
e4“frost resistance tests were all done in laboratory conditions”
Claim · model-written summary
In 52% of the frost protection tests the protective effect of spraying was proved.
Verbatim
t0“fruit plant flowers”
e5“In 52% of tests carried out the protective effect of spraying was proved”
The same questions in other papers
application · phenology · Prunus persica (peach)Positive and negative results
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- no effect
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- no effect
- negative
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See all 16 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.