Judul: Aplikasi Pelaporan Hama Invasif Kutu Putih (Phenacoccus Manihoti Dan Paracoccus Marginatus) Pada Tanaman Singkong
Abstrak: Hama invasif dapat mengancam keanekaragaman hayati, fungsi ekosistem, ketersediaan sumber daya, ekonomi nasional, dan kesehatan manusia. Salah satu hama invasif yang masuk ke Indonesia adalah kutu putih (Phenacoccus mannihoti dan Paracoccus marginatus) menyerang tanaman singkong sejak tahun 2012. Salah satu kendala pada penanganan sepesies invasif adalah luasnya daerah di Indonesia yang menyulitkan ahli dan pengamat hama untuk mengumpulkan data dalam mendeteksi keberadaan hama tersebut. Salah satu strategi yang dapat digunakan adalah teknik pengamatan dengan menggunakan bantuan masyarakat umum, yang disebut dengan citizen science. Penelitian ini akan membuat sebuah aplikasi yang digunakan oleh citizen science untuk melaporkan serangan hama. Hasil dari laporan tersebut akan dikirim ke server IPB dan data lokasinya akan dipetakan ke dalam peta digital. Melalui peta tersebut, para ahli dapat dengan mudah mendeteksi wilayah di Indonesia yang telah terserang hama invasif tersebut untuk dilakukan penanganan lebih lanjut.
Keyword: citizen science, Paracoccus marginatus, Phenacoccus manihoti, spesies invasif

Judul: Biologi dan Neraca Hayati Kutu Putih Singkong, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) pada Tanaman Talinum paniculatum
Abstrak: Kutu putih singkong, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) merupakan hama invasif baru yang berasal dari Amerika Selatan, menyebabkan kerusakan berat pada tanaman singkong di Indonesia sejak tahun 2010. Penggunaan tanaman singkong dalam pembiakan masal P. manihoti di laboratorium mengalami kendala yaitu berkembangnya tungau. Salah satu tanaman inang alternatif P. manihoti yang digunakan yaitu Talinum paniculatum (Portulacaceae). Penelitian telah dilakukan di laboratorium dengan tujuan mempelajari berbagai parameter biologi dan neraca hayati P. manihoti pada T. paniculatum. Rataan lama perkembangan telur 7 sampai 9 hari. Nimfa instar-1, -2, -3 masing-masing berlangsung 9.10, 6.80, 6.80 hari. Rata-rata lama hidup imago betina 28.98 hari, dengan rata-rata fekunditas sebesar 84.08 telur. Laju pertambahan instrinsik (rm) sebesar 0.106 keturunan betina per betina per hari. Rata-rata masa generasi (T) adalah 44.07 hari dan laju reproduksi bersih (Ro) selama periode ini sebesar 85.90. Laju pertambahan terbatas (λ) sebesar 1.11 kali per hari dan masa ganda (Dt) selama 6.86 hari. Hasil penelitian ini menunjukkan bahwa P. manihoti mampu berkembangbiak pada T. paniculatum. Oleh karena itu, T. paniculatum dapat digunakan sebagai tanaman inang alternatif untuk pembiakan massal P. manihoti di laboratorium.
Keyword: kutu putih, Phenacoccus manihoti, singkong, Talinum paniculatum

Judul: The Effects of Variance of Interest rate to Variance of Annuity Future Values
Abstrak: Time value of money is a concept that refers to the difference of the value of money due to time difference. The value of money for present time would not be the same as the value of money in the future. The value of money for present time is called as Present Value (PV) of the money and the value of money for future time is called Future Value (FV) of the money. Determination the value of money, for present and future time, depends on the time and rate of return. The value of money is determined by several factors such as inflation, fluctuation of interest rates, and government policy in securities and taxation. Due to fluctuation of the value of money we need a FV formulation, it is useful for knowing whether an investment can be profitable or not, and this information is useful also in budget analysis. Annuity is defined as a series of payments made for a specific period. The payment, fixed or varied, can be made at the beginning or at the end of the period. Annuity paid at the beginning of the period is called annuity-due and annuity paid at the end of the period is called immediate annuity-certain. The accumulated value of the annuity after few years later is called as a final value or a future value. Burnecki et al. (2003) have discussed about the FV of a fixed-rate annuity in which payments are made according to the arithmetic or geometric series. They have also examined FV for annuities in which payments are made according to arithmetic or geometric series with random rates of interest. This paper examines FV for annuity-due in which payments are made according to arithmetic or geometric series with interest rates as a random variable, which is normal distribution ,  . Future value formula is expressed in recursive form. FV for annuity-due which payments are made according to the arithmetic or geometric series with random rates of interest is calculated by theoretical way and simulation way. The random rates of interest is denoted as k k i  i  , where k i an independent random variable; i is a constant and k  is a random variable which has normal distribution ,  . By using the determined parameters, a sequence of random rates of interest are generated for theoretical calculation. Meanwhile for the simulation, the random rates of interest is generated 1000 times for the simulation. The generated data give mean value, variance, and standard deviation. Moreover, error of mean value, variance, and standard deviation from the theoretical and simulation results are calculated. Error calculation uses Symmetric Mean Absolute Percentage Error (SMAPE). The smaller the value of SMAPE is the more accurate the simulation. The interest rate variances are varied from 0.000036 to 0.0001 to study the relationship between variance of rates of interest and variance of future value. The theoretical and simulation results show that when the variance of random rates of interest increases, then the variance of FV increases linearly. FV of the annuity-due in
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