Abstract
This study assessed the reproduction inhibition effects of Adansonai digitata plant part powders against D. porcellus affecting yam chips. Reproduction of adults D. porcellus were monitored with various doses of Adansonai digitata plant part powders and untreated yam chips as negative control (0 g). The finding of the research indicated that all treatments exhibited anti-reproduction potential and strong inhibition of D. porcellus emergence. The result of analysis of variance showed significant difference between the treated samples and the control (untreated) after 37 days. Adansonai digitata stem bark powders (10 g) was able to achieve no reproduction(0.00) after 37 days exposure. Based on this results, combining yam chips with 10 g of Adansonai digitata stem bark powders could ensure adequate management of D. porcellus destroying yam chips and yam tubers as a whole.
 Keywords: Adansonai digitata, D. porcellus, yam chips, Stem bark powder, Leaf powder
Highlights
In the last decade, the challenges of insect pest infestation is evolving and has led to serious food shortages
Fresh leaves and stem bark of Adansonia digitata were collected in clean polythene bag, identification and authentication was done at the Herbarium of Federal College of Forestry Jos
The reproduction inhibition potential of 10 g stem bark powder of Adansonia digitata resulted in no emergence of D. porcellus adult after 37 days exposure
Summary
The challenges of insect pest infestation is evolving and has led to serious food shortages. Fresh leaves and stem bark of Adansonia digitata were collected in clean polythene bag, identification and authentication was done at the Herbarium of Federal College of Forestry Jos. Infested and healthy tubers of white yam (Dioscorea rotundata) were collected in a sterile polythene bag from Yam market, Gangare, Jos. Isolated insect pests from the infected yam chips were Test for Anti-Reproduction Activity of Adansonia Digitata: Yam chips (50 g) contained in plastic bowls were mixed with different grams (5g, 10g and 15g) of powders of each plant parts.
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