PENGENDALIAN HAYATI Helicoverpa armigera DENGAN NEMATODA DAN JAMUR ENTOMOPATOGEN UNTUK MENINGKATKAN PRODUKTIVITAS TANAMAN TOMAT (Lycopersicon esculentum)

Helicoverpa armigera is the major pest of tomato which causes fruit damage. Farmers are usually using a synthetic pesticide to control the pest, however it makes negative impact on the environment. One of the alternative control is using by biological agents which more environmentally friendly. Field trials evaluating the potential of biological pest control with entomopathogenic nematodes and entomopathogenic fungi were conducted in tomato cultivation. The treatment of pest control consisted of control (no treatment), the entomopathogenic nematode strains Steinernema carpocapsae with population density of 105 IJ/ml, entomopathogenic fungi Beauveria bassiana strain 725 with spore density of 109/ml , combination of B. bassiana strain 725 with spore density of 109/ml + S. carpocapsae with population density of 105 IJ/ml and insecticide (profenofos) with concentration of 0.2 mg/ml. The result of this research indicated (1) B. bassiana more effective to pressure the population of H. armigera because it’s host and geographically specific (2) S. carpocapsae less effective to decrease the production of damage fruit cause pest’s behavior and (3) Aplication of biological agents was able to decrease production of damage fruit. Key words : Biological control, entomopathogenic, fungi and nematod

PERTUMBUHAN DAN HASIL TIGA VARIETAS LOKAL BAWANG MERAH (Allium ascalonicum L.) MENGGUNAKAN BERBAGAI UKURAN BERAT UMBI BIBIT

ABSTRACT The use of onion tubers with various sizes can affect the result of onion productivity. The availability of quality seeds and timely is a factor which plays a role in the success of the farmer of onion. Seed in the form of tubers are planting material that has been long to used in bussines farming. The use of seed tubers has variation measure of in weight. The weight size of seed tubers give affect the growth and result of cultivated shallots. The solution of this problem is looking for the right tuber size to get maximal production and result on local varieties that have been registered and issued by the Department of Agriculture. This research executed in Bagor Subdistrict, Nganjuk Regency in April 2018 until June 2018. It used Rancangan Acak Lengkap Faktorial (RAL Faktorial) with using 2 factor. The first factor was local varieties consisting of Bauji varieties, Biru Lancor and Batu Ijo. The second factor is 4 level of different size tuber weight. If there is a real difference, will be further testing using DMRT (Duncan Multiple Range Test) with an error rate of 5%. The parameters of observation consist of plant height, number of leaves, number of tubers, tuber diameter, tuber wet weight, tuber dry weight, tuber shrinkage and number of tuber layers. The results showed that the effect of the combination of the two factors had very significant effect on the parameters of fresh tuber weight and dry weight of onion. The varieties treatment showed the best results for fresh weight of the bulbs were Blue Lancor varieties. The treatment of seed tuber weight showed results to fresh weight of tuber was the weight of a large tuber. Key words: Onions, Seed Bulbs, Local Varieties. ABSTRAK Penggunaan umbi bawang merah dengan berbagai ukuran dapat berpengaruh terhadap hasil produktivitas bawang merah. Ketersediaan bibit yang berkualitas dan tepat waktu merupakan faktor yang ikut berperan dalam keberhasilan usaha tani bawang merah. Bibit yang berupa umbi merupakan bahan tanam yang sudah lama digunakan dalam usaha tani bawang merah. Penggunaan umbi bibit memiliki keragaman dalam ukuran berat. Ukuran berat umbi bibit berpengaruh terhadap pertumbuhan dan hasil bawang merah yang dibudidayakan. Solusi dari permasalahan tersebut adalah dengan mencari ukuran berat umbi bibit yang tepat agar mendapatkan produksi dan hasil secara maksimal pada varietas lokal yang sudah terdaftar dan dikeluarkan oleh Kementerian Pertanian. Penelitian ini dilaksanakan di Kecamatan Bagor Kabupaten Nganjuk pada bulan April 2018 hingga bulan Juni 2018. Penelitian ini menggunakan Rancangan Acak Lengkap Faktorial (RAL Faktorial) dengan menggunakan 2 faktor. Faktor pertama yaitu varietas lokal yang terdiri varietas Bauji, Biru Lancor dan Batu Ijo. Faktor kedua yaitu 4 taraf ukuran berat umbi bibit yang berbeda. Apabila ada beda nyata dilakukan uji lanjut dengan menggunakan DMRT (Duncan Multiple Range Test) dengan taraf kesalahan 5%. Parameter pengamatan meliputi tinggi tanaman, jumlah daun, jumlah umbi, diameter umbi, berat basah umbi, berat kering umbi, penyusutan umbi dan jumlah lapisan umbi. Hasil penelitian menunjukkan pengaruh kombinasi kedua faktor berpengaruh sangat nyata pada parameter jumlah umbi, berat segar umbi dan berat kering jemur umbi bawang merah. Perlakuan varietas menunjukkan hasil terbaik untuk berat segar umbi adalah varietas Biru Lancor. Perlakuan berat umbi bibit menunjukkan hasil untuk berat segar umbi adalah berat umbi bibit ukuran besar. Kata Kunci : Bawang Merah, Umbi Bibit, Varietas Lokal

PENGARUH KONSENTRASI EKSTRAK BAWANG MERAH DAN AIR KELAPA TERHADAP PERTUMBUHAN STEK PUCUK JAMBU AIR MADU DELI HIJAU (Syzygium samarangense)

ABSTRACT Green Deli Rose Apples (Syzygium samarangense) has several beneficial properties in terms of usability, cultivation, health, and economy. The intensive development of green deli rose apples plants is needed given increasing demand, needs, and has bright prospects. One of the efforts to develop green deli rose apples plants is through handling plant propagation. Propagation of green deli rose apples can be done in two ways, namely generative and vegetative. Generative propagation requires a relatively long time, while vegetative propagation have difficult to growth in rooted. Shoot-cuttings is one of the vegetative propagation that has been chosen because it is easier to root than the old parts of the plant. The use of plant growth regulators (PGR) is needed to stimulate green deli rose apples shoot-cuttings rooting. Alternative PGR is giving shallot extract and coconut water as a substitute for synthetic auxin which has a relatively expensive price. The purpose of this study was to determine the combination of the effect of the concentration shallot extract and coconut water, as well as to find out the concentration of shallot extracts and coconut water which was most influential on the growth of shoot-cutting of green deli rose apples. The extract shallot concentration used is control, 0,5%, 1,0%, and 1,5%. The coconut water concentration used is control, 20%, 30% and 40%. Data obtained next analyzed and tested using DMRT α 5%. The result showed te best treatment combination for concentration shallot extract of 0,5% and coconut water of 20%.   Keywords: greend deli rose apples, shoot-cutting, shallot extract, coconut water ABSTRAK Jambu air madu deli hijau (MDH) (Syzygium samarangense) memiliki beberapa sifat yang menguntungkan baik dari segi kegunaan, budidaya, kesehatan, maupun ekonomi. Pengembangan tanaman secara intensif diperlukan mengingat permintaan dan kebutuhan yang semakin meningkat, serta memiliki prospek yang cerah. Salah satu usaha pengembangan tanaman yaitu melalui penanganan perbanyakan tanaman. Perbanyakan dapat dilakukan dengan dua cara yaitu generatif dan vegetatif. Perbanyakan secara generatif membutuhkan waktu yang relatif lama, sedangkan perbanyakan vegetatif memiliki kendala sulit membentuk perakaran. Stek pucuk merupakan salah satu perbanyakan vegetatif yang banyak dipilih karena lebih mudah berakar dibandingkan bagian tanaman tua. Penggunaan zat pengatur tumbuh (ZPT) diperlukan untuk merangsang perakaran stek pucuk jambu air MDH. Alternatif ZPT yaitu pemberian ekstrak bawang merah dan air kelapa sebagai pengganti auksin sintetis yang memiliki harga relatif mahal. Penelitian ini bertujuan untuk mengetahui kombinasi pengaruh konsentrasi ekstrak bawang merah dan air kelapa terhadap pertumbuhan stek pucuk jambu air MDH, serta mengetahui konsentrasi ekstrak bawang merah dan air kelapa yang paling berpengaruh terhadap pertumbuhan stek pucuk jambu air MDH. Konsentrasi ekstrak bawang merah yang digunakan antara lain kontrol, 0,5%, 1% dan 1,5%. Konsentrasi air kelapa yang digunakan antara lain kontrol, 20%, 30%, dan 40%. Data yang diperoleh selanjutnya dianalisis dan diuji menggunakan DMRT α 5%. Hasil penelitian menunjukkan kombinasi perlakuan terbaik untuk konsentrasi ekstrak bawang merah dan air kelapa adalah konsentrasi 0,5% dan air kelapa 20%.   Kata Kunci: jambu air madu deli hijau, stek pucuk, ekstrak bawang merah, air kelap

(Agronomical and anatomical study of resulted early cocoa (Theobroma cacao L.) grafting

Cocoa grafting and budding is usually carried out on 4-5 month old seedling, thus it needs 9-12 months to be ready tranplanted to the field. Effort to shorten time in the nursery can be done by early propagation. The aim of this research was to study effect of clones, tying and foliar application of grafsticks on the percentage of graftake. This study was carried out in Kaliwining Experimental Station, 45 m a.s.l. and D climate type (Schmidt & Ferguson). First experiment was RCBD design and replicated 3 times, and factorial treatment 4 x 3. The first factor were clones, i.e. TSH 858, ICS 13, ICS 60 and DR 2, the second factor was grafstick wiring, i.e. without, wiring 2 and 4 weeks before using. The 2nd experiment using RCBD design replicated 3 times and factorial treatment 3 x 3 x 2. The first factor was clones, i.e. KW 162, KW 163 and KW 165; the second ones was wiring, i.e. without, wiring 2 and 4 weeks before using, and the 3rd factor was manuring, i.e. with and without foliar application. Rootstock was ICS 60 seedlings of 30 day old, and grafting method was cleft grafting above cotyledons. Variables observed include C and N total of the grafstick, percentage of graftake, shoot length, diameter, wet and dry weight. The result showed that because the grafstick flush periodically, graftstick wiring was not effective to increase total nutrient (C and N) on the grafstick. Furthermore, their effect on the graftake was not significant. Until 30 days first, percentage of graftake was 90-100%, but then decreased sharply to 30-60% depend on the clones. From the first experiment, DR 2 showed the highest graftake (62%), and KW 162 (39%) was the 2nd ones. Symptom on the death plants was started on the new leaves, that showed wilt, necrotic then fall. Isolation of those symptoms in the laboratory showed that Rhizoctonia solani, Phytophthora palmivora and Colletotrichum gloeosporioides. Anatomical analysis of the death graft union showed parenchymatous linked, weak and hollow when microtomised. Health union showed lignified accumulation that made tight union. It can be concluded that early cocoa grafting will success if the nursery is separated far from cocoa plantation, the medium is steril from soil borne disease, the graftstick is health, and tying of graft union must tight enough, then disease control must be done properly. Key Words : Theobroma cacao, clone, wiring, graft union, graftake

Caffeine Content of Bondowoso Arabica Ground Coffee with Variation of Roasting Profile and Type of Packages

Bondowoso Arabica coffee is a type of coffee that grows on the slopes of Mount Ijen-Raung. It has a high commercial value and distinctive taste. Coffee processing applications from roasting, grinding, packaging and brewing to storage will affect the quality of coffee. Caffeine is one of the compounds in coffee that contributes to bitterness and has certain pharmacological effects. This study aimed to determine the caffeine content of Bondowoso Arabica coffee harvested on August 2021 which was obtained from Sukosari Lor village with various roast profiles and types of packaging. In this study, Arabica coffee was roasted with light roast, medium roast and dark roast profiles. Then each treatment was mashed to obtain ground coffee. Ground coffee was put in a standing pouch made of polyethylene terephthalate (PET) with a thickness of 75 microns; polypropylene (PP) with a thickness of 100 microns; and polypropylene (PP) with a thickness of 120 microns and then stored for three months. During the storage of first and third months, caffeine levels were measured. Based on the results of the study, the caffeine content was increase along with higher roasting temperature. During the storage process, the caffeine content in ground coffee packaged using PP decreased the most