Hostname: page-component-76fb5796d-5g6vh Total loading time: 0 Render date: 2024-04-26T04:31:40.210Z Has data issue: false hasContentIssue false
  • English
  • Français

Woolly aphid of apple, Eriosoma lanigerum (Hsm.), and its control in Southern Rhodesia

Published online by Cambridge University Press:  10 July 2009

A. J. M. Carnegie
Get access Rights & Permissions [Opens in a new window]

Extract

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.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 53 , Issue 4 , January 1963 , pp. 609 - 619
Copyright
Copyright © Cambridge University Press 1963

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Evenhuis, H. H. (1958). Een oecologisch onderzoek over de appelbloedluis, Eriosoma lanigerum (Hausm.), en haar parasiet Aphelinus mali (Hald.) in Nederland.—Tijdschr. PlZiekt. 64 pp. 1–103.Google Scholar
Evenhuis, H. H. (1959). Effect van insekticiden op de bloedluisparasiet Aphelinus mali.—Meded. Dir. Tuinb. 22 pp. 306–311.Google Scholar
Georgala, M. B. (1953). The woolly aphis of apple and its control.—Fmg in S. Afr. 28 pp. 21–22, 27.Google Scholar
Jack, R. W. (1922–23). Insect pests of fruits other than Citrus in Southern Rhodesia.—Rhod. agric. J. 19 pp. 569–582, 664–674, 20 pp. 59–72.Google Scholar
Lundie, A. E. (1939). The apple grower's insect ally.—Fmg in S. Afr. 14 p. 162 repr. 5 pp.Google Scholar
Schneider, H. (1958). Untersuchungen über den Einfluss neuzeitlicher Insektizide und Fungizide auf die Blutlauszehrwespe (Aphelinus mali Hald.).—Z. angew. Ent. 43 pp. 173–196.Google Scholar