|
|
| |
Cosmolaelaps simplex (Berlese), a Polyphagous Predatory Mite Feeding on Root-knot
Nematode Meloidogyne javanica and Citrus Nematode Tylenchulus semipenetrans |
|
Suloiman M. Al Rehiayani and Ahmed H. Fouly |
Abstract:
Biological aspects of the laelapid mite Cosmolaelaps simplex (Fox)
was studied for the first time after feeding on one acarid mite species Caloglyphus
rodriguezi Samsinak and egg masses of two plant parasitic nematodes Meloidogyne
javanica Treub and Tylenchulus semipenetrans (Cobb) at 26°C. Also,
the effect of adding of mite individuals or aldicarb to citrus seedlings infected
with citrus nematodes T. semipenetrans was investigated under greenhouse
conditions. The laelapid mite successfully completed its life span feeding on
the previous preys. The developmental time of C. simplex averaged 8.4,
8.8 and 10.6 days for male immatures and averaged 10.3, 12.6 and 13.9 days for
females when they were fed on acarid mites and egg masses of both M. javanica
and T. semipenetrans at 26°C, respectively. Larvae didn’t feed and
the mite passed through two nymphal stages before adulthood. Males had a shorter
life span than females where they lasted for an average of 37.6, 42.0 and 44.9
days for males and 45.7, 45.9 and 48.6 days for females after feeding on the
same previous food sources, respectively. Arrhenotoky parthenogenesis was observed
where un-mated females put eggs that gave males. Egg production was higher when
C. simplex fed on the acarid mites where the net reproductive rate (Ro)
was 20.46, while it decreased to 13.62 and 13.10 after feeding on egg masses
of root-knot and citrus nematodes, respectively. The predatory mite had a mean
generation time (T) of 22.24, 21.07 and 20.22, while the net rate of natural
increase (rm) was 0.135, 0.123 and 0.127 after feeding on the aforementioned
preys, respectively. Enhanced citrus seedlings growth were achieved when citrus
seedlings were treated with the nematicide aldicarb and followed by those treated
with mite individuals added at the same time of nematode inoculation. Compared
to the nematode-alone control, all mite treatments and aldicarb significantly
restricted reproduction of citrus nematode. Nematode populations ranged
from 1386 to 1665 J2/100 cm3 soil for the mite-treated plants compared
to 4011 J2/100 cm3 soil for the nematode untreated control. Moreover,
the predatory mite C. simplex showed a preferable response to the acarid
mites but it also significantly reduced citrus nematode T. semipenetrans
populations under greenhouse conditions.
|
|
|
PDF
References
Citation
Report Citation
|
|
|
|
| RELATED ARTICLES: |
|
|
|
|
|
|
|
|
|
How to cite this article:
Suloiman M. Al Rehiayani and Ahmed H. Fouly , 2005. Cosmolaelaps simplex (Berlese), a Polyphagous Predatory Mite Feeding on Root-knot
Nematode Meloidogyne javanica and Citrus Nematode Tylenchulus semipenetrans. Pakistan Journal of Biological Sciences, 8: 168-174.
DOI: 10.3923/pjbs.2005.168.174
URL: https://scialert.net/abstract/?doi=pjbs.2005.168.174
|
|
|
|
|
| COMMENT ON THIS PAPER |
|
|
|
|
| |
 |
Navigation |
| |
|
|
| |
|
Indexed In |
| |
|
|
Subscribe Today 
