Addae-Mensah, Nda-Agyima K.. M.S.A.B.E., Purdue University, May 2014. Quality Changes in Hermetic Stored Corn caused by Fungi and Sitophilus zeamais (Motschulsky). Major Professors: Klein Ileleji and Linda Mason. Hermetic storage has been shown to be effective in controlling insect pests and maintaining grain quality of dry grains at 13% moisture and below. However, the feasibility and use of h...

Plants extracted substances can constitute the best alternative to synthetic chemical insecticides and a good preservation of environment because they are biodegradables. The leaves Plectranthus glandulosus were with hexane, acetone methanol, then fractionated tested on adults Sitophilus zeamais Callosobruchus maculatus. Corn cowpea seeds each administered three (3) different doses (1, 5 10 g/k...

Maize grain of hybrid AN 447 was: (a) infested with Sitophilus zeamais and infected with Aspergillus chevalieri; (b) infested with S. zeamais; (c) infected with A. chevalieri; and (d) grain free of insects and fungus (control); the treatments were stored for 30 days at 268C and 15% moisture content, under hermetic and non-hermetic conditions to monitor the oxygen concentration, insect mortality...

Guo, Danping. M.S., Purdue University, May 2015. Kernel and Bulk Density Changes due to Moisture Content, Mechanical Damage, and Insect Damage. Major Professor: Klein Ileleji. Corn (Zea Mays), is one of the major grain crops in the world and moisture content, mechanical damage and insect damage are three factors that affect its quality. The primary goal of this thesis was to investigate the eff...

Intracellular symbiosis (endosymbiosis) with gram-negative bacteria is common in insects, yet little is known about how the host immune system perceives the endosymbionts and controls their growth and invasion without complete bacterial clearance. In this study, we have explored the expression of a peptidoglycan recognition protein gene of the weevil Sitophilus zeamais (wPGRP); an ortholog in D...

Calotropis gigantea produces secondary metabolites. Some toxicity tests on several pest species had been conducted, yet the most susceptible towards C. extract is still unknown. This study aims to determine insect and behavior of insects extract. The test methods used in this research were leaf dipping spraying upon four different orders (Bactrocera carambolae [Diptera: Tephritidae], Nilapavata...