Journal ArticleDOI
Gryon flavipes (Ashmead) [Hymenoptera, scelionidae], an egg-parasite of the rice earbugLeptocorisa oratorius (Fabricius) [Hem. Alydidae]
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TLDR
Gryon flavipes (Ashmead) is an egg-parasite of the rice earbug, Leptocorisa oratorius (Fabricius) in Sarawak, and maximum parasitism varies between 40–90%, which is at least partially density-dependent but does not prevent the build-up of Leptokorisa numbers.Abstract:
Gryon flavipes (Ashmead) is an egg-parasite of the rice earbug,Leptocorisa oratorius (Fabricius) in Sarawak. The life cycle is completed in 10–16 days. One larva develops per host egg, and maximum parasitism varies between 40–90%. Parasitism is at least partially density-dependent but does not prevent the build-up ofLeptocorisa numbers.read more
Citations
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Journal ArticleDOI
Sib-mating and sex ratio strategies in scelionid wasps
TL;DR: A test of the hypothesis that the optimal sex ratio for a species should decrease with increasing levels of sib‐mating for members of the parasitoid family Scelionidae is made.
Journal ArticleDOI
Scelionid wasps as biological control agents: a review
TL;DR: Research which has been done indicates that a variety of approaches are possible for augmenting scelionid populations, which range from simple innundative releases to manipulation of preferred nectar-bearing plants.
Journal ArticleDOI
Observations on the ecology of the rice-ear bug Leptocorisa oratorius (F.) (Hemiptera: Alydidae) in Sarawak (Malaysian Borneo).
TL;DR: The observations on Leptocorisa species described here were made irregularly during 1964-65, and rather more regularly in 1967 and 1968, as this is the most important species in Sarawak as well as neighbouring countries in south-east Asia.
Book ChapterDOI
When Is a Rice Insect a Pest: Yield Loss and the Green Revolution
TL;DR: In this paper, a number of methods to estimate crop losses are available and more than one should be used and more accurate crop loss assessments are expensive to obtain for a nation on a regular basis, estimates are only available for limited areas of countries.
Journal ArticleDOI
The influence of the rice bug Leptocorisa oratorius on rice yield
H. van den Berg,Soehardi +1 more
TL;DR: It is concluded that the application of insecticides targeted at L. oratorius is mostly unwarranted, and farmers need practical training on the biology of L.oratorius and its feeding on rice to appreciate why chemical control is generally not required.
References
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Journal ArticleDOI
A catalogue of Philippine Hymenoptera (with a bibliography, 1758-1963).
TL;DR: This catalogue brings together the widely scattered information on Philippine Hymenoptera covering the past 205 years and incorporates these so as to up-date the catalogue to 1963.
Journal ArticleDOI
Comparative Biology of the Two Scelionid Egg Parasites of Nezara viridula L. (Hemiptera : Pentatomidae)
Journal ArticleDOI
Observations on the ecology of the rice-ear bug Leptocorisa oratorius (F.) (Hemiptera: Alydidae) in Sarawak (Malaysian Borneo).
TL;DR: The observations on Leptocorisa species described here were made irregularly during 1964-65, and rather more regularly in 1967 and 1968, as this is the most important species in Sarawak as well as neighbouring countries in south-east Asia.
Journal ArticleDOI
Oviposition behaviour of two egg parasites,Asolcus mitsukurii Ashmead andTelenomus nakagawai Watanabe [Hym., Proctotrupoidea, Scelionidae]
Nobuhiko Hokyo,Keizi Kiritani +1 more
TL;DR: Le comportement d'agressivité chez le mâle du genre Asolcus semble avoir une signification écologique différente de celui des femelles, tandis que Telenomus nakagawai est unisexué and non agressif.
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