TY  - JOUR
T1  - Development of<I> Callosobruchus  maculatus</I> Fabricius on Grain Legumes Used as Cover Crops
AU - , B.N. Iloba AU - , S.B.A. Umoetok 
JO  - Agricultural Journal
VL  - 2
IS  - 1
SP  - 97
EP  - 100
PY  - 2007
DA  - 2001/08/19
SN  - 1816-9155
DO  - aj.2007.97.100
UR  - https://makhillpublications.co/view-article.php?doi=aj.2007.97.100
KW  - Insect development
KW  -C. maculatus
KW  -oviposition
KW  -susceptible
KW  -cover crops
KW  -grain legumes
AB  - The development of <I>Callosobruchus maculatus</I> F. on five grain legumes-<I>Calopogonium</I> <I>mucunoides</I> Desv., <I>Centrosema</I> <I>pubescens</I> Benth, <I>Desmodium intortium</I> (Mill) Urb., <I>Flemingo</I> <I>congesta</I> (Vestita Benth ex Barker) and <I>Pureria phaseoloides</I> (Roxb) Benth used as cover crops in Oil-Palm Plantations in Nigeria was studied under laboratory conditions. <I>Vigna unguiculata</I> L. Walp seed was used as control. Each of the six leguminous seeds was infested with five males and five females of <I>C.</I> <I>maculatus</I>.  The treatments were arranged on a laboratory bench in Complete Randomised Design (CRD).  <I>V</I>.<I> unguiculata</I> had the highest geometric mean diameter of 78.85 mm and 1000 seed mass of 283.33 g, followed by <I>C</I>. <I>pubscens</I> with 3.35 mm  and 33.33±4.71 g seed mass. Eggs were laid on five of the species except <I>D</I>. <I>intortium </I>and the number increased with increase in  seed  size.  The  number  of  eggs  laid was significant  (p = 0.05) and ranged from 123.2 in <I>V</I>. <I>unguiculata</I>, <I>F</I>. <I>congesta</I> 63.5 and <I>C</I>. <I>mucunoides</I> 36.7, <I>C</I>. <I>pubesens</I> 18.2 and <I>P</I>. <I>phaseoloides</I> 17.2. Although development was complete in <I>F</I>. <I>congesta</I>, only miniature adults measuring 2.6 mm were produced while <I>C</I>. <I>maculatus</I> adults on <I>V</I>. <I>unguiculata</I> measured 3.9 mm. Development from egg to adult took 25±2 days in <I>V</I>. <I>unguiculata</I> and 33±1.5 days in <I>F</I>. <I>congesta </I>while it did not go beyond the third larval instar in <I>P</I>. <I>phaseoloides</I>.  For management of <I>C.</I> <I>maculatus</I>, <I>C.</I> <I>mucunoides,</I> <I>C.</I> <I>pubescens</I>, <I>D. intortium</I> and <I>P. phaseoloides</I> are recommended for use as cover crops since they are not alternative host plants of <I>C</I>. <I>maculatus</I>.
ER  -