Kulit pisang merupakan bahan buangan (limbah buah pisang) yang banyak jumlahnya. Beberapa penelitian telah mengungkap manfaat kulit pisang kepok. Berdasarkan kajian tentang pemanfaatan kulit pisang kepok yang telah dilakukan sebelumnya, penelitian ini bertujuan untuk mengetahui kandungan kimia yang ada pada kulit pisang kapok sebagai bahan pestisida nabati menekan serangan serangga hama tanaman umur pendek. Sampel pada penelitian ini adalah kulit pisang kepok yang terbengkalai. Sampel selanjutnya dikeringkan dan dibuat menjadi serbuk kasar. Sampel dimaserasi selama 72 jam menggunakan pelarut etanol 96%. Kemudian dilakukan uji fitokimia untuk mengetahui adanya flavonoid, alkaloid, steroid, tanin, saponin dan triterpenoid. Hasil uji fitokimia kulit pisang kapok menunjukkan adanya kandungan bahan aktif flavonoid, alkaloid, tanin, saponin dan triterpenoid. Kandungan bahan aktif yang terdapat pada kulit pisang kapok tersebut memiliki potensi sebagai bahan alam pestisida nabati karena dapat mempengaruhi serangga hama tanaman umur pendek.

Questioning skills are very important for prospective teacher students to master in order to help students learn actively in class later. Students' questioning skills are empowered through case study learning of environmental pollution subjects. Because it discusses pollution in the environment, a solution needs to be found. The purpose of this study was to determine the questioning skills of prospective teacher students in environmental pollution course using case study method. This qualitative descriptive research was conducted in the odd semester of the 2020/2021 academic year. The measurement instrument was in the form of scoring the students' questioning skill level based on the cognitive level of the revised bloom taxonomy. The research data were analyzed by using the percentage technique. The results showed that the questions asked by students at the low order thinking skills level were 83.33% and the high order thinking skills level was 26.66%. Furthermore, it is necessary to habituate students with asking questions with more intensive assistance and lecturers can provide more examples of questions at the high order thinking skills level.

This chapter focuses on Sclerotinia sclerotiorum and Sclerotinia minor, the causal agents of sclerotinia diseases affecting field and vegetable crops in Canada, and provides an overview of the bacteria (including Bacillus subtilis and Bacillus cereus) and fungi (such as Coniothyrium minitans, Gliocladium catenulatum [Clonostachys rosea f. catenulata], Gliocladium virens, Talaromyces flavus, Trichoderma viride and Trichothecium roseum) that have been tested for their management, and the evaluation of effectiveness of these biological control agents. Future research prospects are recommended.