Abstract
A constant low-intensity light, produced by a 50-watt flood lamp, is controlled with a constant-voltage transformer and a rheostat. Light is passed through damaged leaves laid on a specimen stage and is received by a cadmium-sulfide photo-conductive cell. Photocell response is measured by a 0–50 direct-current microammeter, with greater leaf damage resulting in higher readings. Light transmissive quality of undamaged soybean leaves was established with the device, and a regression model was computed that related light readings to leaf tissue removed. A comparison of damage position on the leaf specimen stage yielded low standard errors and generally nonsignificant F ratios. A high degree of accuracy was attained with damage samples of 0.836 in.2 (1 1/32-in-diam circle) or less. Use of the device in soybean feeding investigations with the green cloverworm, Plathypena scabra (F.) (Lepidoptera: Noctuidae), indicated that larvae consumed on an average of 19 in.2 of leaf-surface area. Sixth-instar feeding accounted for 69.1% of this value.
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Claims 6
Claim · model-written summary
Greater leaf damage yielded higher photocell readings.
- Taxon
- soybean
Glycine maxe1 - Organ / stage
- leavese1
- Outcome
- readingse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photocell response is measured by a 0–50 direct-current microammeter, with greater leaf damage resulting in higher readings.”
e1“undamaged soybean leaves”
Claim · model-written summary
The device linked light readings to removed soybean leaf tissue.
- Taxon
- soybeanGlycine maxe0
- Outcome
- light readingse0
- Comparator
- leaf tissue removede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light transmissive quality of undamaged soybean leaves was established with the device, and a regression model was computed that related light readings to leaf tissue removed.”
Claim · model-written summary
Damage position produced low standard errors and generally nonsignificant F ratios.
- Taxon
- soybeanGlycine maxe1
- Outcome
- standard errorse0
- Direction
- lowe0
- Comparator
- damage positione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A comparison of damage position on the leaf specimen stage yielded low standard errors and generally nonsignificant F ratios.”
e1“undamaged soybean leaves”
Claim · model-written summary
The device attained high accuracy for damage samples no larger than 0.836 in.2.
- Taxon
- soybeanGlycine maxe1
- Outcome
- accuracye0
- Value
- 0.836 in.2e0
- Qualifier
- or lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high degree of accuracy was attained with damage samples of 0.836 in.2 (1 1/32-in-diam circle) or less.”
e1“undamaged soybean leaves”
Claim · model-written summary
Green cloverworm larvae consumed an average 19 in.2 of soybean leaf surface.
- Taxon
- green cloverworm
.jpg?width=60)
Hypena scabrae0 - Interactor
- soybeanGlycine maxe0host
- Outcome
- leaf-surface areae0
- Value
- 19 in.2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Use of the device in soybean feeding investigations with the green cloverworm, Plathypena scabra (F.) (Lepidoptera: Noctuidae), indicated that larvae consumed on an average of 19 in.2 of leaf-surface area.”
Claim · model-written summary
Sixth-instar feeding accounted for 69.1% of consumed leaf surface.
- Taxon
- green cloverwormHypena scabrae1
- Organ / stage
- Sixth-instare0
- Outcome
- feedinge0
- Value
- 69.1%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sixth-instar feeding accounted for 69.1% of this value.”
e1“green cloverworm, Plathypena scabra (F.)”