Evaluation of traditional method of stored product protection: Effect of mixing tef (Eragrostis tef) grains with stored chickpea on occurrence of Adzuki bean beetle (Callosobruchus chinensis) and its natural enemies

2021 ◽  
pp. 1-8
Author(s):  
Tebkew Damte ◽  
Geteneh Mitiku
Keyword(s):  
Natural Enemies ◽  
Traditional Method ◽  
Eragrostis Tef ◽  
Callosobruchus Chinensis ◽  
Adzuki Bean ◽  
Protection Effect ◽  
Adzuki Bean Beetle ◽  
Bean Beetle ◽  
Product Protection

scholarly journals Drop or fly? Negative genetic correlation between death-feigning intensity and flying ability as alternative anti-predator strategies

2006 ◽  
Vol 274 (1609) ◽  
pp. 555-560 ◽  
Author(s):  
Tatsunori Ohno ◽  
Takahisa Miyatake
Keyword(s):  
Genetic Correlation ◽  
Significant Negative Correlation ◽  
Callosobruchus Chinensis ◽  
Adzuki Bean ◽  
Death Feigning ◽  
Prey Animal ◽  
Adzuki Bean Beetle ◽  
Geographical Regions ◽  
Bean Beetle ◽  
Points Of View

A prey animal may have the alternative of flying away or feigning death when it encounters predators. These alternatives have a genetic base as anti-predator strategies in the adzuki bean beetle, Callosobruchus chinensis . A negative genetic correlation between death-feigning intensity and flying ability was found in C. chinensis , i.e. lower flying ability is genetically connected to escaping by dropping from a perch and then feigning death, whereas higher flying ability does not correspond to death-feigning behaviour. Two bidirectional artificial selections for death-feigning duration and flying ability were conducted independently in C. chinensis . The strains selected for shorter (longer) duration of death-feigning had higher (lower) flying ability, while the strains selected for lower (higher) flying ability showed longer (shorter) duration of death-feigning. When the two traits were compared in 21 populations of C. chinensis derived from different geographical regions, a significant negative correlation was found between death-feigning intensity and flying ability. Based on these results, the choice between alternative escaping behaviours in animals is discussed from two points of view: phenotypic plasticity, an individual with two tactics; and pleiotropic genetic correlation, different individuals with opposite strategies.

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