Abstract
In insecticide trials in Southern Rhodesia against the woolly apple aphid, Eriosoma lanigerum (Hsm.), using methyl-demeton (0·078 and 0·052 per cent. active ingredient), dimethoate (0·0625 and 0·0417 per cent. active ingredient), diazinon (0·0625 per cent. active ingredient) and malathion (0·1041 per cent. active ingredient) as foliar sprays, all insecticides gave good control of infestations above ground, but methyl-demeton and diazinon gave the best control, and treatments were followed by slower rates of repopulation. Injecting the lower part of the trunks of trees 25 to 30 years old with ½ fluid ounce of a concentrate of a systemic insecticide, 50 per cent. methyl-demeton or 40 per cent. dimethoate, at a single point gave excellent control where that part of the sap stream supplying the aphid colonies was intercepted. By injecting with a spiral of small holes around the trunk using ½ fl. oz. 50 per cent. methyl-demeton, control of all aphids on the tree could generally be achieved. Good control of subterranean aphid colonies on 15-year-old trees was achieved by the application to the soil of 4 gal. per tree of a fluid containing 100 cc. of a concentrate containing 75 per cent. of V-C 13 (O,O-diethyl O-2,4-dichlorophenyl phosphorothioate) diluted with water. Biological control of E. lanigerum in Southern Rhodesia by the Hymenopterous parasite Aphelinus mali (Hald.), which was introduced in 1961, shows great promise.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Insecticides applied as foliar sprays all gave good control of woolly aphid infestations above ground on apple.
- Taxon
- apple
Malus domesticat0 - Treatment
- foliar sprayse0
- Interactor
- Eriosoma lanigerum
Eriosoma lanigerumt1pest - Outcome
- control of infestations above grounde0
- Setting
- Southern Rhodesiat1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e0“as foliar sprays, all insecticides gave good control of infestations above ground”
Claim · model-written summary
Methyl-demeton and diazinon gave the best control of woolly aphid among the insecticides tested on apple.
- Taxon
- appleMalus domesticat0
- Treatment
- methyl-demeton and diazinone1
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Outcome
- best controle1
- Direction
- beste1
- Comparator
- all insecticidese0
- Setting
- Southern Rhodesiat1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e0“as foliar sprays, all insecticides gave good control of infestations above ground”
e1“but methyl-demeton and diazinon gave the best control”
Claim · model-written summary
Insecticide treatments were followed by slower rates of woolly aphid repopulation on apple.
- Taxon
- appleMalus domesticat0
- Treatment
- treatmentse2
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Outcome
- rates of repopulatione2
- Direction
- slowere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e2“and treatments were followed by slower rates of repopulation”
Claim · model-written summary
Injecting a systemic insecticide into the lower trunk of apple trees at a single point gave excellent control of woolly aphid where the sap stream feeding the colonies was intercepted.
- Taxon
- appleMalus domesticat0
- Organ / stage
- lower part of the trunkse3
- Treatment
- systemic insecticidee3
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Outcome
- excellent controle3
- Direction
- excellente3
- Qualifier
- where that part of the sap stream supplying the aphid colonies was interceptede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e3“Injecting the lower part of the trunks of trees 25 to 30 years old with ½ fluid ounce of a concentrate of a systemic insecticide, 50 per cent. methyl-demeton or 40 per cent. dimethoate, at a single point gave excellent control where that part of the sap stream supplying the aphid colonies was intercepted”
Claim · model-written summary
Injecting around the trunk in a spiral of small holes with 50 per cent. methyl-demeton could generally achieve control of all aphids on the apple tree.
- Taxon
- appleMalus domesticat0
- Treatment
- injecting with a spiral of small holes around the trunke4
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Outcome
- control of all aphids on the treee4
- Qualifier
- generallye4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e4“By injecting with a spiral of small holes around the trunk using ½ fl. oz. 50 per cent. methyl-demeton, control of all aphids on the tree could generally be achieved”
Claim · model-written summary
Soil application of V-C 13 gave good control of subterranean woolly aphid colonies on 15-year-old apple trees.
- Taxon
- appleMalus domesticat0
- Treatment
- V-C 13e5
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Outcome
- Good control of subterranean aphid coloniese5
- Qualifier
- 15-year-old treese5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e5“Good control of subterranean aphid colonies on 15-year-old trees was achieved by the application to the soil of 4 gal. per tree of a fluid containing 100 cc. of a concentrate containing 75 per cent. of V-C 13”
Claim · model-written summary
Biological control of woolly aphid by the introduced parasite Aphelinus mali shows great promise in Southern Rhodesia.
- Taxon
- appleMalus domesticat0
- Treatment
- Aphelinus malie6
- Interactor
- Eriosoma lanigerumEriosoma lanigerumt1pest
- Second interactor
- Aphelinus mali
Aphelinus malie6biocontrol_agent - Outcome
- Biological controle6
- Qualifier
- which was introduced in 1961e6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Woolly aphid of apple”
t1“Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia”
e6“Biological control of E. lanigerum in Southern Rhodesia by the Hymenopterous parasite Aphelinus mali (Hald.), which was introduced in 1961, shows great promise”
The same questions in other papers
insecticide · Eriosoma lanigerum · Malus domestica (apple)Results agree
1 paper in the same direction as this paper
- positive
application · Eriosoma lanigerum · Malus domestica (apple)Results agree
3 papers in the same direction as this paper
- positive
- 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.