Pengaruh Pemberian Ekstrak Pinang (Areca Catechu L.) Terhadap Kesintasan Telur Keong Mas (Pomacea Canaliculata Lamarck)

Keong mas (Pomacea canaliculata Lamarck) merupakan hama potensial tanaman padi sawah yang berkembangbiak dengan sangat cepat sehingga sulit untuk menekan perkembangannya. Salah satu jenis tanaman yang dapat mengendalikan dan menekan populasi hama ini adalah pinang (Areca catechu L). Penelitian tentang pengaruh pemberian ekstrak pinang terhadap kesintasan telur keong mas, telah dilaksanakan di Laboratorium Biologi Undana Kupang. Tujuan penelitian ini adalah untuk mengetahui: 1) pengaruh pemberian ekstrak biji pinang terhadap kesintasan telur keong mas, (2) nilai LC50 ekstrak biji pinang terhadap mortalitas telur keong mas, (3) nilai LT50­ ekstrak biji pinang terhadap mortalitas telur keong mas. Dalam penelitian ini digunakan rancangan acak lengkap dengan enam perlakuan yang terdiri dari tiga ulangan. Data penelitian dianalisis dengan analisis ragam dan analisis probit untuk menghitung LC50 dan LT50. Hasil penelitian menunjukkan bahwa (1) pemberian ekstrak pinang efektif dalam menghambat dan mematikan telur keong mas serta memberikan pengaruh nyata terhadap kesintasan telur keong mas. (2) nilai LC50 ekstrak pinang adalah pada konsentrasi 18.899% dengan garis regresi Y=10.56 + 1.98x dan (3) nilai LT50 ekstrak pinang yaitu pada 72,980 jam. Pemanfaatan ekstrak pinang sangat direkomendasikan bagi petani padi sawah yang ingin membasmi hama keong mas

Development of Plants Morphology Characteristics Textbook to Improve Students' Ability in Identifying Plants

The selection and use of appropriate textbooks in the lecture process is an important factor for improving science process skills. This study aims to develop textbooks on plant morphological characteristics that are valid, practical, and effective in increasing students' ability to identify plants. The method used is research and development with a design Plomp model which consists of five stages in the form of (1) initial investigation, (2) design, (3) realization, (4) testing, evaluation, and revision, (implementation). The subjects of this study were students who took plant anatomy and morphology courses, the academic year 2020/2021 of the STKIP Soe Biology education study program. Data collection techniques in the form of observation, tests, and questionnaires. The product in the form of a textbook developed was tested for validity based on the research results of the expert team as a validator. The practicality of the product was tested using a student and lecturer response questionnaire analysis. The textbook effectiveness test was carried out through quasi-experimental research with analytical techniques using an independent sample T-test and normalized gain scores. The results showed that the textbooks developed were valid, practical, and effective to improve students' ability to identify plant species