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The pine shoot moths, Dioryctria rubella Hamps. (Lepidoptera : Pyralidae) and Petrova cristata Wals. (Lepidoptera : Tortricidae), in the Philippines  [1987]

Lapis, E.B. (Forest Research Institute, College, Laguna (Philippines))

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Abstract
The presence of and the damage by the pine shoot moth was first published in 1963, although heavy infestation had been observed in 1959. It was not until 1982 that the pine shoot moths were identified as Dioryctria rubella and Petrova cristata. The pine shoot moths was observed in plantations of Pinus kesiya, P. merkusii and Pinus caribaea planted in wide areas. At present, almost all young pine plantations are infested by the shoot moths. Damage on the young trees is usually caused by the larvae of the pests, which tunnel and feed inside the shoots. The deformity caused by the moths reduces the quality and utility of the pine timber. Dioryctria rubella also attacks young cones of Pinus kesiya, thus preventing seed formation and reducing seed production. In 1982, a research project aimed at controlling the pine shoot moths was started by FORI and UPLB-CF in cooperation with BFD. The preliminary results are as follows : (1) Sumicidin 3 EC and Sumipine 3EC were found effective in reducing shoot damage and infestation, if applied before the newly-hatched larvae start to bore into the shoots, that is when average length of the new shoots is about 5 in. (2) Bacillus thuringiensis could reduce shoot moth infestation up to 95 percent when applied before the larvae bore into the shoots. (3) Eriborus sp., an ichneumonid wasp, was found effective (54 percent) as larval parasite of the pine shoot moths. (4) Trials involving 37 provenances of pines has screened Pinus
caribaea var. bahamensis as the most resistant provenance against the pine shoot moths. Hence, this provenance is suitable as a source of shoot moth resistant genes for a tree improvement program. The author further recommends research activities for the next five years.
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Other subjects

  • infestation
  • dioryctria
  • insecte depredateur des tiges
  • pinus
  • infestacion
  • petrova
  • philippines
  • filipinas
  • insectos daninos del tallo

From the journal

Biotrop Special Publication (Indonesia)

ISSN : 0125-975X

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Other information

Language : English

Type : Conference

In AGRIS since : 1993

Issue : 26

Publisher : SEAMEO-BIOTROP

All titles :

" The pine shoot moths, Dioryctria rubella Hamps. (Lepidoptera : Pyralidae) and Petrova cristata Wals. (Lepidoptera : Tortricidae), in the Philippines "