Abstract
Root drenches of diazinon and of demeton on greenhouse chrysanthemum were compared for growth-response effects in plants grown in complete and phosphorus deficient nutrient solutions. Drenches of diazinon resulted in different degrees of inhibition of plant growth. Analysis of soil showed no detectable differences in phosphorus (P) content because of diazinon treatment. Plants grown in sand culture and treated with demeton showed symptoms of phytotoxicity expressed as brown margins of lower leaves 1 week following treatments of 32, 64, 128 pounds per acre in both nutrient solutions. Later, plants showed significant growth inhibition in complete nutrient solutions at 128 pounds per acre, while an increase in growth was observed with a P-deficient nutrient solution. However, this effect was less than that observed in the controls with complete nutrients. Application of a fixed amount of demeton to plants grown under certain element deficiencies indicated that the growth response obtained is associated only with P deficiency. Attempts to correlate this increase in growth with the P in the insecticide and that in the leaf tissue were unsuccessful. It is suggested that the growth-response effects associated with diazinon and demeton treatments reported in the literature may be attributed to other factors such as changes in soil fauna and flora, including nematodes, insects, fungi, and bacteria.
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Claims 7
Claim · model-written summary
Diazinon drenches inhibited chrysanthemum growth to varying degrees.
- Taxon
- Chrysanthemum morifolium
Chrysanthemum ×morifoliumt0 - Treatment
- Drenches of diazinone0
- Outcome
- plant growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drenches of diazinon resulted in different degrees of inhibition of plant growth”
t0“Chrysanthemum morifolium”
Claim · model-written summary
Diazinon caused no detectable difference in soil phosphorus content.
- Taxon
- Chrysanthemum morifoliumChrysanthemum ×morifoliumt0
- Treatment
- diazinon treatmente0
- Outcome
- phosphorus (P) contente0
- Direction
- no detectable differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of soil showed no detectable differences in phosphorus (P) content because of diazinon treatment”
t0“Chrysanthemum morifolium”
Claim · model-written summary
Demeton caused brown lower leaf margins after one week at three doses in both nutrient solutions.
- Taxon
- chrysanthemum
.jpeg?width=60)
Chrysanthemumt0 - Treatment
- demetone0
- Outcome
- brown margins of lower leavese0
- Qualifier
- 1 week following treatments of 32, 64, 128 pounds per acre in both nutrient solutionse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“Plants grown in sand culture and treated with demeton showed symptoms of phytotoxicity expressed as brown margins of lower leaves 1 week following treatments of 32, 64, 128 pounds per acre in both nutrient solutions”
t0“Greenhouse Chrysanthemum, Chrysanthemum morifolium”
Claim · model-written summary
Demeton at 128 pounds per acre significantly inhibited growth with complete nutrients.
- Taxon
- chrysanthemumChrysanthemumt0
- Treatment
- 128 pounds per acree0
- Outcome
- growthe0
- Direction
- inhibitione0
- Qualifier
- complete nutrient solutionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants showed significant growth inhibition in complete nutrient solutions at 128 pounds per acre”
t0“Greenhouse Chrysanthemum, Chrysanthemum morifolium”
Claim · model-written summary
Demeton increased growth under phosphorus deficiency, less than complete-nutrient controls.
- Taxon
- chrysanthemumChrysanthemumt0
- Treatment
- P-deficient nutrient solutione0
- Outcome
- growthe0
- Direction
- increasee0
- Comparator
- controls with complete nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase in growth was observed with a P-deficient nutrient solution. However, this effect was less than that observed in the controls with complete nutrients”
t0“Greenhouse Chrysanthemum, Chrysanthemum morifolium”
Claim · model-written summary
The demeton growth response was associated only with phosphorus deficiency.
- Taxon
- chrysanthemumChrysanthemumt0
- Treatment
- P deficiencye0
- Outcome
- growth responsee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growth response obtained is associated only with P deficiency”
t0“Greenhouse Chrysanthemum, Chrysanthemum morifolium”
Claim · model-written summary
The growth increase could not be correlated with phosphorus in insecticide or leaf tissue.
- Taxon
- chrysanthemumChrysanthemumt0
- Compound
- Pe0
- Outcome
- increase in growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Attempts to correlate this increase in growth with the P in the insecticide and that in the leaf tissue were unsuccessful”
t0“Greenhouse Chrysanthemum, Chrysanthemum morifolium”
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See all 52 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.