Abstract
Abstract Processing tomatoes ( Lycopersicon esculentum Mill.) grown in field plots with soil infested or not infested with Phytophthora parasitica Dastur. were furrow-irrigated for 4 to 8 hr every 14 days (normal) or 28 days (less frequent) or with alternating 4- to 8-hr and 24-hr irrigations every 14 days (prolonged). Disease developed more rapidly and symptom severity was significantly greater on shoots and roots of plants that received prolonged irrigations. Disease symptoms on roots progressed more rapidly and were observed earlier than those on shoots in plants given prolonged or normal irrigation. Severe disease during early vegetative and reproductive growth caused significant reductions in total plant, leaf, and fruit dry matter and in the numbers of flowers and fruit in plants receiving either prolonged or normal irrigation. Diseased plants given prolonged irrigation also partitioned less total dry matter into leaves and fruit and more into stems than noninoculated plants. Less frequent irrigation of infested plots caused a delay in disease onset and reduced the impact of disease on numbers of flowers, fruit, and dry matter accumulation. Phytophthora-induced water stress during critical stages of crop development apparently can have major impacts on plant growth, phenology, and yield in processing tomato.
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Claims 8
Claim · model-written summary
Prolonged irrigation increased disease development speed and shoot and root symptom severity.
- Taxon
- Processing Tomatoest0
- Organ / stage
- shoots and rootse0
- Treatment
- prolonged irrigationse0
- Outcome
- symptom severitye0
- Direction
- greatere0
Not reportedComparator
Verbatim
e0“Disease developed more rapidly and symptom severity was significantly greater on shoots and roots of plants that received prolonged irrigations”
t0“Processing Tomatoes”
Claim · model-written summary
Root symptoms progressed faster and appeared earlier than shoot symptoms under prolonged or normal irrigation.
- Taxon
- Processing Tomatoest0
- Treatment
- prolonged or normal irrigatione0
- Outcome
- Disease symptoms on rootse0
- Direction
- more rapidlye0
- Comparator
- those on shootse0
Not reportedInteractorInteractor role
Verbatim
e0“Disease symptoms on roots progressed more rapidly and were observed earlier than those on shoots in plants given prolonged or normal irrigation”
t0“Processing Tomatoes”
Claim · model-written summary
Severe early disease reduced total plant, leaf, and fruit dry matter.
- Taxon
- Processing Tomatoest0
- Treatment
- Severe diseasee0
- Outcome
- total plant, leaf, and fruit dry mattere0
- Direction
- reductionse0
- Qualifier
- early vegetative and reproductive growthe0
Not reportedInteractorComparator
Verbatim
e0“Severe disease during early vegetative and reproductive growth caused significant reductions in total plant, leaf, and fruit dry matter and in the numbers of flowers and fruit in plants receiving either prolonged or normal irrigation”
t0“Processing Tomatoes”
Claim · model-written summary
Severe early disease reduced flower and fruit numbers.
- Taxon
- Processing Tomatoest0
- Treatment
- Severe diseasee0
- Outcome
- numbers of flowers and fruite0
- Direction
- reductionse0
- Qualifier
- early vegetative and reproductive growthe0
Not reportedComparator
Verbatim
e0“Severe disease during early vegetative and reproductive growth caused significant reductions in total plant, leaf, and fruit dry matter and in the numbers of flowers and fruit in plants receiving either prolonged or normal irrigation”
t0“Processing Tomatoes”
Claim · model-written summary
Diseased plants under prolonged irrigation allocated less dry matter to leaves and fruit than noninoculated plants.
Verbatim
e0“Diseased plants given prolonged irrigation also partitioned less total dry matter into leaves and fruit and more into stems than noninoculated plants”
t0“Processing Tomatoes”
Claim · model-written summary
Diseased plants under prolonged irrigation allocated more dry matter to stems than noninoculated plants.
Verbatim
e0“Diseased plants given prolonged irrigation also partitioned less total dry matter into leaves and fruit and more into stems than noninoculated plants”
t0“Processing Tomatoes”
Claim · model-written summary
Less frequent irrigation in infested plots delayed disease onset.
Not reportedComparator
Verbatim
e0“Less frequent irrigation of infested plots caused a delay in disease onset and reduced the impact of disease on numbers of flowers, fruit, and dry matter accumulation”
t0“Processing Tomatoes”
Claim · model-written summary
Less frequent irrigation reduced disease impact on flower and fruit numbers and dry matter accumulation.
- Taxon
- Processing Tomatoest0
- Treatment
- Less frequent irrigatione0
- Outcome
- impact of disease on numbers of flowers, fruit, and dry matter accumulatione0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“Less frequent irrigation of infested plots caused a delay in disease onset and reduced the impact of disease on numbers of flowers, fruit, and dry matter accumulation”
t0“Processing Tomatoes”
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