Journal of Crop Protection
Journal of Crop Protection
JCP
Agriculture
http://jcp.modares.ac.ir
1
admin
2251-9041
2251-905X
en
jalali
1394
6
1
gregorian
2015
9
1
4
3
online
1
fulltext
en
Screening for new sources of resistance to Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) infestation in stored maize genotypes
New sources of maize resistance to the maize weevil, <em>Sitophilus zeamais</em> infestation are indispensable in successful breeding programs against post harvest grain damage. The study investigated the characters and mechanisms that confer resistance to weevil infestation using twenty elite maize genotypes. Detailed morphological and physical studies were conducted on whole-maize grain. The grain hull was separated from the whole-maize grain with a locally-fabricated machine and subjected to chemical analysis. Resistance was assessed at 33 days post infestation using weevil mortality, weevil survival, percent grain damage, weight of grain powder, percent weight loss and oviposition as indices rated on a scale developed by the present study. The resistant genotypes identified, particularly 2000SYNEE-WSTR and TZBRELD3C5 with very high degree of resistance should be used singly or best in an integrated pest management system for the control of <em>S. zeamais </em>infestation in stored maize. Though increases in the physical properties of grain hardness, weight, length and width increased varietal resistance, it was found that the bases of resistance were increased chemical attributes of phenolic acid, trypsin inhibitor and crude fiber while the bases of susceptibility were increased protein and starch. Characters that conferred resistance on the tested genotypes were found in the grain hull. The study identified antibiosis and antixenosis as the mechanisms of maize post harvest resistance to <em>S. zeamais</em> infestation.
Sitophilus zeamais,maize,resistance,Antibiosis,antixenosis
277
290
http://jcp.modares.ac.ir/browse.php?a_code=A-3-1000-8087&slc_lang=en&sid=3
Luke
Chinaru Nwosu
Luke
Chinaru Nwosu
100319475328460054760
100319475328460054760
Yes
Food Storage Technology Program, Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria.
Food Storage Technology Program, Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria.
Chris
Olukayode Adedire
Chris
Olukayode Adedire
100319475328460054664
100319475328460054664
No
Food Storage Technology Program, Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria.
Food Storage Technology Program, Department of Biology, Federal University of Technology, Akure, Ondo State, Nigeria.
Emmanuel
Oludele Ogunwolu
Emmanuel
Oludele Ogunwolu
100319475328460054663
100319475328460054663
No
Department of Crop & Environmental Protection, University of Agriculture, Makurdi, P. M. B. 2373, Benue State, Nigeria.
Department of Crop & Environmental Protection, University of Agriculture, Makurdi, P. M. B. 2373, Benue State, Nigeria.