(i) Dealing with locusts that infest a maize field requires a broad understanding of the biology of locusts, as well as knowledge of the ecology and behavior of the species that are causing the infestation. This can include understanding the biology of the locust species, the behavior of the locusts, the ecology of the locusts, Integrated Pest Management (IPM), the use of chemical control, and others
(ii)
(a) Sap Vacuole. A vacuole, specifically the central vacuole or the so-called "Sap vacuole" in plants is a large, membrane-bound organelle that stores water and dissolved nutrients. Its main function is to store and transport materials within the cell. The central vacuole stores a wide variety of materials, including water, enzymes, waste products, and pigments, it also plays a role in maintaining the shape and turgor pressure of the plant cell.
(b) Nucleolus: The nucleolus is a small, dense structure found within the nucleus of a eukaryotic cell. Its main functions are to produce and process ribosomal RNA, which is a critical component of ribosomes, the cell's protein-making machinery. The nucleolus also plays a role in organizing chromosomes and regulating the cell cycle. It is formed by the combination of genetic material and proteins, and is involved in the transcription of the ribosomal DNA, the synthesis and assembly of the ribosomal subunits, and the regulation of the expression of the genes that encode the ribosomal components.
I hope this helps :)