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Soekadar Wiryadiputra
Pusat Penelitian Kopi dan Kakao Jember
Agriculture, Biological Sciences & Forestry

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Hama Penggerek Buah Kakao - Kendala Utama Industri Kakao Indonesia dan Saran Pengelolaannya Soekadar Wiryadiputra
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9361

Abstract

Outbreak of cocoa pod borer has occurred inCentral Sulawesiand other Indonesian provinces since 1991. The reason of the outbreak has not been clearly defined, however, it was presumed that the event look place after tremendous expansion of cocoa plantation in the last two decades. Until December, 1995 the pest has infested 11 provinces including several main cocoa producing areas ofIndonesia. Total cocoa area damaged by the pest is about 40,000 ha. Bioecological aspects and management of the pest were reviewed from some recent literatures. These information should be useful to arrange the control strategy of the pest inIndonesia. Control measures developed in other countries can be adopted directly in handling the pest, especially for short term practices. 
Percobaan Pendahuluan Pengaruh Minyak Mimba dan Ekstrak Biji Srikaya terhadap Mortalitas Helopeltis sp. (Heteroptera: Miridae) Soekadar Wiryadiputra
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 2 (1998)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9906

Abstract

Preliminary trial of neem (Azadirachta indica A. Juss.) seed oil and aqueous seed extract of custard-apple (Annona squamosa L.) on the mortality of Helopeltis sp. has been conducted in laboratory condition. Neem oil obtained from directly pressed seed kernel and aqueous extract of custard-apple seed at concentration of 1.0% and 2.0% were significantly causing the mortality of the insect. The effectiveness of the substances in killing Helopeltis were not significantly different with propoxur and sipermethrin insecticides. Neem oil obtained from steamed seed before being pressed and aqueous leaf extracts were also causing high mortality but still lower than two substances previously applied. Number of eggs produced by Helopeltis treated with the neem oil and seed extract of custard-apple were also significantly lower than control.
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