Judul: Inventarisasi hama kesemak di kecamatan argapura, kabupaten majalengka propinsi jawa barat
Abstrak: Praktek Lapang dilaksanakan selama dua bulan (Pebruari sampai dengan April 1985) di Kecamatan Argapura, Kabupaten Majalengka, dan bertujuan untuk mengamati dan menginventarisasi serangga hama pada pertanaman kesemek. Pengamatan dilaksanakan di desa Argalingga dan desa Argamukti banyak ditumbuhi pohon kesemek. Areal pengamatan berkisar antara 18 - 19 ha dengan jumlah tanaman sebanyak 11755 pohon. Jarak antar pohon contoh 50 meter. Pengambilan contch dimulai dari batas terluar desa dan berakhir di pusat desa. Jumlah tanaman yang diamati per desa 75 pohon, sehingga jumlah keseluruhan 150 pohon contoh. Serangga yang ditemukan pada pertanaman kesemek adalah Anomala viridis (F.) (Coleoptera: Scarabaeidae), Holotrichia javama Brensk (Coleoptera: Scarabaeidae), Paracoptos sp. (Coleoptera: Cerambycidae), spesies a dan b (Coleoptera: Scolytidae), spesies c (Homoptera: Cocci- dae), spesies d dan e (Lepidoptera: Psychidae), Thrips (Thysanoptera), Cyana haemacta (Lepidoptera: Arctiidae), Cryptogonus orbiculus (Coleoptera: Coccinellidae). ...
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Judul: Infentarisasi Serangga-Serangga Fitofag Pada Tanaman Jambu Mete (Anacardium occidentale L.) Di Kecamatan Sindang Barang, Kabupaten Cianjur Jawa Barat
Abstrak: Jambu mete merupakan tanaman yang mudah tumbuh. Walaupun demikian, dalam usaha pembudidayaannya banyak hambatan yang dijumpai, diantaranya adalah serangan hama. Survei bertujuan untuk mengetahui jenis-jenis serang- ga yang menyerang tanaman jambu mete. Survei dilakukan di perkebunan jambu mete rakyat di Kecamatan Sindangbarang, Kabupaten Cianjur, Jawa Barat mulai 3 Februari sampai 3 Mei 1986. Serangga-serangga fitofag yang ditemukan adalah: Aphis nigricans Van der Goot (Homoptera: Aphididae), Acro- cercops sp. (Lepidoptera: Lithocolletidae), Coccus viridis Green (Homoptera: Coccidae), Caloptilia sp. (Lepidoptera: Lithocolletidae), Cricula trifenestrata Helf. (Lepidopte- ra: Saturniidae), Ferrisia virgata Ckll. (Homoptera: Pseu- dococcidae), Exopholis hypoleuca Wied. (Coleoptera: Melo- lonthidae), E. costata Burm. (Coleoptera: Melolonthidae), Gargara sp. (Homoptera: Membracidae), Poeciloptera tinoi- des (Homoptera: Ricaniidae), Leptocentrus sp. (Homoptera: Membrecidae), Planococcus sp. (Homoptera: Pseudococcidae), Rastrococcus sp. (Homoptera: Pseudococcidae), Rayap (Iso- ptera: Termitidae), Saissetia nigra Nietn. (Homoptera: Coccidae), Selenothrips rubrocintus Giard. (Thysanoptera: Thripidae), Tessaratoma javanica Thunb. (Hemiptera: Penta- tomidae) dan Captosoma siamicum Walker (Hemiptera: Penta- tomidae). Serangga fitofag yang banyak menimbulkan keru- sakan adalah Acrocercops sp., Caloptilia sp., Coccus viri dis dan Cricula trifenestrata. Musuh alami C. trifenestrata adalah Xanthopimpla sp. (Hymenoptera: Ichneumonidae), Brachymeria sp. (Hymenopte- ra: Chalcididae), lalat Spesies A (Diptera: Tachinidae) dan lalat Spesies B (Diptera: Sarcophagidae)….
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell