Abstract
From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia, the results of delaying insecticide protection of crops against Heliothis attack by four and eight weeks were re-examined. With each delay the crop set later when temperatures were cooler, the plants older and larger, and the accumulated insect damage greater. Yet there was no significant difference in the final number of bolls produced in each crop. The growth of cotton and the compensatory mechanisms of the plant indicated by the data were simulated by a simple computer model. A modification of the model to simulate the response of a cotton plant to attack by Heliothis larvae was also developed. Output from the model suggests that, under the conditions of the experiment, there is a theoretical maximum number of bolls produced by this cotton variety. To produce this maximum crop requires complete protection from Heliothis larvae, but the period of protection can be minimised.
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Claims 6
Claim · model-written summary
Delaying insecticide protection against Heliothis attack by four and eight weeks produced no significant difference in the final number of bolls.
- Taxon
- cotton
Gossypium hirsutume0 - Material
- Stoneville 7Ae0
- Treatment
- delaying insecticide protection of crops against Heliothis attack by four and eight weekse1
- Outcome
- final number of bollse3
- Setting
- Ord River Irrigation Area of Western Australiae0
HeliothisNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e1“the results of delaying insecticide protection of crops against Heliothis attack by four and eight weeks were re-examined”
e3“Yet there was no significant difference in the final number of bolls produced in each crop”
Claim · model-written summary
Each delay of insecticide protection left greater accumulated insect damage on cotton.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- delaye2
- Outcome
- accumulated insect damagee2
- Direction
- greatere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e2“With each delay the crop set later when temperatures were cooler, the plants older and larger, and the accumulated insect damage greater”
Claim · model-written summary
With each delay, the cotton crop set later.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- delaye2
- Outcome
- crop sete2
- Direction
- latere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e2“With each delay the crop set later when temperatures were cooler, the plants older and larger, and the accumulated insect damage greater”
Claim · model-written summary
With each delay, the cotton plants were older and larger.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- delaye2
- Outcome
- plantse2
- Direction
- older and largere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e2“With each delay the crop set later when temperatures were cooler, the plants older and larger, and the accumulated insect damage greater”
Claim · model-written summary
A simulation model suggests a theoretical maximum number of bolls for this cotton variety under the experimental conditions.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- theoretical maximum number of bollse4
- Qualifier
- under the conditions of the experimente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e4“Output from the model suggests that, under the conditions of the experiment, there is a theoretical maximum number of bolls produced by this cotton variety”
Claim · model-written summary
Complete protection from Heliothis larvae is needed for the maximum crop, but the protection period can be minimised.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- period of protectione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“From trials with cotton (variety Stoneville 7A) grown on the Ord River Irrigation Area of Western Australia”
e5“To produce this maximum crop requires complete protection from Heliothis larvae, but the period of protection can be minimised”
The same questions in other papers
Heliothis · yield · Gossypium hirsutum (cotton)Positive and negative results
2 in the opposite direction
- positive
- positive
insecticide · yield · Gossypium hirsutum (cotton)Results differ
16 papers in the same direction as this paper · 59 in the opposite direction
- positive
- positive
- positive
72 papers more in this group
See all 76 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.