Abstract
This paper reports the results of studies on the nuclear polyhedrosis virus-of the cotton bollworm Heliothis armigera.The virus was isolated in 1974 from dead boll-worms collected from cotton fields in Chinchow district of Hupeh Province.It was designated as VHA-273.It is observed that the polyhedra are hexagonal,pentahedron,cubical or irregular in shape,varying from 1.25 to 5.0 p in diameter.Serious pathological changes were in the fat-body,epidermis,tracheal matrix and other tissues of the diseased insects and the former two seemed to be the most susceptible tissues.The muscle bundles were not affected.Our bioassay showed that the susceptibility of the larvae to the NPV varied with dosage,larval instar and temperature.The first and second instars were the most susceptible stages;and their mortality rates at 1×106 PIBs/ml were 85% and 80% and the time lasting were 6 and 8 days respectively.Larvae of fifth and sixth instars were not so susceptible,especially when the temperature exceeded 33℃.Cross infections of the NPV with tobacco budworm,Heliothis assulta,was susccessful.In 1975,from July to September,field tests with the NPV to control bollworms were made in cotton fields about 102 mil's at Kung-an County of Hupeh Province.The concentrations used were 1.5×1010 PIBs/mu,3×1010 PIBs/mu and 6×1010 PIBs/mu.The results showed that the NPV was better than the chemical insecticides 1605+DDT.Combined use of the NPV with dilute sevin and Bacillus thurin-giensis suspensions were also tested;and the results were either better or as effective as the NPV or sevin used alone.The application of the NPV VHA-273 to control bollworms in the field seems promising.
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Claims 10
Claim · model-written summary
NPV VHA-273 was isolated from dead cotton bollworms.
- Taxon
- cotton
Gossypium hirsutume0 - Interactor
- boll-worms
.jpg?width=60)
Helicoverpa zeae0pest - Outcome
- virus was isolatede0
- Value
- 1974e0
- Setting
- Chinchow district of Hupeh Provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“virus was isolated in 1974 from dead boll-worms collected from cotton fields in Chinchow district of Hupeh Province.It was designated as VHA-273”
Claim · model-written summary
Viral polyhedra varied in shape and diameter.
- Taxon
- COTTONGossypium hirsutumt0
- Outcome
- polyhedra are hexagonal,pentahedron,cubical or irregular in shapee0
- Value
- 1.25 to 5.0 pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“polyhedra are hexagonal,pentahedron,cubical or irregular in shape,varying from 1.25 to 5.0 p in diameter”
t0“COTTON BOLLWORM”
Claim · model-written summary
Infected bollworms had serious pathology in fat body, epidermis and tracheal matrix; muscle bundles were unaffected.
- Taxon
- COTTONGossypium hirsutumt0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- pathological changese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Serious pathological changes were in the fat-body,epidermis,tracheal matrix and other tissues of the diseased insects and the former two seemed to be the most susceptible tissues.The muscle bundles were not affected”
t0“COTTON BOLLWORM”
Claim · model-written summary
Larval NPV susceptibility varied with dose, instar and temperature.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- dosagee0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- susceptibility of the larvae to the NPVe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“susceptibility of the larvae to the NPV varied with dosage,larval instar and temperature”
t0“COTTON BOLLWORM”
Claim · model-written summary
At 1×106 PIBs/ml, first-instar larval mortality was 85% over six days.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1×106 PIBs/mle0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- mortality ratese0
- Value
- 85%e0
- Qualifier
- firste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“first and second instars were the most susceptible stages;and their mortality rates at 1×106 PIBs/ml were 85% and 80% and the time lasting were 6 and 8 days respectively”
t0“COTTON BOLLWORM”
Claim · model-written summary
At 1×106 PIBs/ml, second-instar mortality was 80% over eight days.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- 1×106 PIBs/mle0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- mortality ratese0
- Value
- 80%e0
- Qualifier
- second instarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“first and second instars were the most susceptible stages;and their mortality rates at 1×106 PIBs/ml were 85% and 80% and the time lasting were 6 and 8 days respectively”
t0“COTTON BOLLWORM”
Claim · model-written summary
Fifth- and sixth-instar larvae were less susceptible, particularly above 33℃.
- Taxon
- COTTONGossypium hirsutumt0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- Larvae of fifth and sixth instars were not so susceptiblee0
- Qualifier
- temperature exceeded 33℃e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Larvae of fifth and sixth instars were not so susceptible,especially when the temperature exceeded 33℃”
t0“COTTON BOLLWORM”
Claim · model-written summary
NPV cross infected tobacco budworm.
- Taxon
- tobacco
Nicotiana tabacume0 - Interactor
- Heliothis assulta
_Figure_22c.jpg?width=60)
Helicoverpa assultae0pest - Outcome
- Cross infections of the NPVe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Figure_22c.jpg?width=500)
Verbatim
e0“Cross infections of the NPV with tobacco budworm,Heliothis assulta,was susccessful”
Claim · model-written summary
NPV controlled bollworms better than 1605 plus DDT in cotton field tests.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- NPVe0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- BOLLWORM CONTROLt0
- Direction
- bettere0
- Comparator
- 1605+DDTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NPV was better than the chemical insecticides 1605+DDT”
t0“COTTON BOLLWORM AND ITS FIELD TESTS IN BOLLWORM CONTROL”
Claim · model-written summary
Combining NPV with dilute sevin or Bacillus suspensions was at least as effective as NPV or sevin alone.
- Taxon
- COTTONGossypium hirsutumt0
- Treatment
- Combined use of the NPV with dilute sevin and Bacillus thurin-giensis suspensionse0
- Interactor
- BOLLWORMHelicoverpa zeat0pest
- Outcome
- BOLLWORM CONTROLt0
- Direction
- better or as effectivee0
- Comparator
- NPV or sevin used alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combined use of the NPV with dilute sevin and Bacillus thurin-giensis suspensions were also tested;and the results were either better or as effective as the NPV or sevin used alone”
t0“COTTON BOLLWORM AND ITS FIELD TESTS IN BOLLWORM CONTROL”
The same questions in other papers
carbaryl · Helicoverpa zea · Gossypium hirsutum (cotton)Positive and negative results
2 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
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.