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J. Rimbing
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry

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JENIS PARASITOID TELUR HAMA Conopomorpha cramerella PADA TANAMAN KAKAO DI SULAWESI UTARA Kandowangko, D.; Engka, R.; Rimbing, J.
EUGENIA Vol 17, No 1 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.1.2011.96

Abstract

Controllling of pestpopulationon cocoa fruitis moreeffectiveandefficientusingeggparasitoid.Parasitoidtype on cocoa fruit pestC. cramerella in North Sulawesi has not been investigated. Investigation ofparasitoid type on cocoa fruit pestC. cramerella in North Sulawesi was initiated by collecting cacao podsto observethe eggs ofCoryra cephalonicaandtrapingof itseggs. Samples of cocoa fruits were collectedthree times. Each collecting samples, the cocoa fruitswere gathered between 45-80each time.TheCoryra cephalonicaeggswere trapped between4000-600of each trapping. The result showed that only1-2eggsthat grew into theperfect stage, whereas eggs which were not grown to perfect stage were6-14eggs. The rest of the eggs were not grown.The finding indicated thatparasitoid type on cocoa fruitpestC. cramerella in North Sulawesiwas not found. Rainy season during collecting samples could causethe eggs of C. cramerellanot grown. ABSTRAKUntuk menekan populasi hama penggerek buah kakao yang lebih efektif dan efisien dapat dilakukandengan menggunakan parasitoid telur. Jenis parasitoid hama penggerek buah kakao, C. cramerella diSulawesi Utara belum diketahui. Untuk mendapatkan data parasitoid dilakukan pengambilan contohbuah untuk mengamati telur-telur C. cephalonica dan traping telur Coryra cephalonica. Lokasi penelitianadalah Desa Kumu Kabupaten Minahasa, Desa Sapa dan Pungkol Kabupaten Minahasa Selatan.Penelitian dilakukan selama tiga kali dengan mengambil contoh buah kakao 45 - 80 buah perpengambilan dan traping telur berkisar 4000 – 600 butir per peletakkan. Dari sejumlah telur yangditemukan hanya 1 – 2 butir yang berkembang menjadi sempurna, sedangkan telur yang tidakberkembang secara sempurna lebih tinggi berkisar antara 6 – 14 butir. Jumlah telur yang tidakberkembang secara sempurna cukup tinggi, hal ini merupakan salah satu faktor pembatas, sehinggabelum ditemukan parasitoid telur hama penggerek buah kakao. Selama penelitian berlangsung terjadimusim hujan, hal ini yang mungkin berpengaruh terhadap perlkembang telur C. cramerella.Pengambilan contoh pertama terdapat bekas telur-telur C. cramerella yang terparasit dan pada periodeterjadi musim kemarau. Demikian pula dengan melakukan traping telur, C. cephalonica padapertanaman kakao diketiga lokasi sebanyak 3 kali untuk setiap lokasi belum ditemukan parasitoid yangmemarasit telur C. cephalonica.
APLIKASI PUPUK DAN MULSA JERAMI PADA TANAMAN KEDELAI TERHADAP SERANGAN HAMA DAN PRODUKSI Rimbing, J.; Pelealu, J.; Sualang, D.
EUGENIA Vol 21, No 1 (2015)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.21.1.2015.11804

Abstract

ABSTRACT   The research was arranged in a randomized block design (RBD), with 10 treatments and 3 replications. To get the active insects pests, net sweepings were done for the flying insects, while other pests were observed directly on the plants. Collecting data of plant damages were made by systematic diagonal lines, except for viruses, census was conducted on each experimental plot.  The results of this experiment documented 12 species of insect pests attacking soybean plants. Soybean pest populations were relatively low, except for Aphis glycine that was quite high. In all treatments, plant damage caused by sucking pest Piezodorus sp and Riptortus linearis were relatively low of 1.53 % to 1.94 %; it indicated an insignificant effect to decline the production. Crop damages by virus showed a significant effect. The lowest virus attacks found on compost of 5 tons per ha with 43 plants infected per treatment, the highest virus attack showed on combination of 5 tons compost per ha + inorganic fertilizer + mulch, in which there were 274 infected plants per treatment. Apparently virus attacks gave impact on soybean production. The highest production were documented on treatment of 5 tons compost per ha with production of 0.55 tons per ha, while the lowest production was found on combination of 5 tons compost per ha + inorganic fertilizer + mulch, in which the production was 0.22 tons per ha. Keywords:  fertilizer, mulch, insect pest, production
Co-Authors D. Kandowangko D. Sualang, D. J. Pelealu, J. R. Engka