IOSR-JAVS   Volume-8 ~ Issue-7 ~ JULY-2015

ABSTRACT: Studies were done on the edaphic factors and their effects on the performance of cocoyam in the humid environment of Rivers and Bayelsa States of Nigeria. Fungal incidence in the three zones of Rivers and Bayelsa States namely, coastal plain sands (Igbo and Baen), Warri-SombreicDeltaic plain (Obrikoin and Ahoada) and Meander Belt (Agudama and Kaiama) were studied. The following micro-organisms (fungi) were isolated.From Igbo, Aspergillusniger, Mucorsp, Peniciliumsp, Rhizopusstolonifer, Aspergillusflavus, Sclerotiumrolfsii.Aspergillusniger, Mucorsp, Aspergillusflavus, Penicillumsp, Rhizopusstolonifer, Fusariumsp were isolated from Baen soil. Mucorsp.

[1]. Adebowale, K.O., and Lawal, O.S. (2002b). Effect of annealing and heat moisture conditioning on the physiochemical characteristics of Bambara groundnut Voandzeiasubsterranstarch. Nahrung/Food, 46, 311 – 316.
[2]. FAO. (1984). FAO production year book. (1984, Rome Pp. 115)
[3]. Federal Office of Statistics (1978) Annual Report, Lagos, Nigeria.
[4]. Goenaga, R. and U. Chardon, (1995). Growth, yield and nutrient uptake of taro grown under upland conditions. J.Plant Nutr. 18(5); 1037 – 1048
[5]. Goenaga, R. and P. Hepperly, (1990). Flowering, Pollen and Seed Viability and Artificial Hybridization of TanniasXanthosomaSpp. J. Agric Univ. PR 74(3), July

ABSTRACT: The incidence of Fungi on Post Harvest Cocoyam cultivars in three zones within Rivers and Bayelsa states namely, Coastal Plain Sands (Igbo and Baen), Warri Sombreic Deltaic Plain (Obrikom and Ahoada) and Meander Belt (Agudama and Kaiama) was studied. Four cocoyam cultivars were used for the study namely, Xanthosoma mafaffa (Ede uhie and Ede ocha) cultivars and a(Cocoindia and Ede nwachukwu) cultivars. The following micro-organisms of rot of the roots and corms (Cocoyam Decline Disease) were isolated. From X.mafaffaEde uhie, Mucor sp, Rhizopus stolonifer, Fusarium spand Aspergillus niger.Aspergillus flavus, Rhizopus stolonifer, Fusarium spand Aspergillus flavus were isolated from X.mafaffac.v Ede ocha. From C.esculentac.v (Coco India),Aspergillus flavus, Aspergillus niger, Rhizopus stolonifer and Mucor sp, while Mucor sp, Rhizopus stoloniferand Aspergillus niger were isolated from Colocasia esculentac.v. Ede nwachukwu.Most of the fungi isolated from the corms were present in the soil. Susceptibility of the cocoyam cultivars, X.mafaffa (Ede uhie and Ede ocha) and C.esculenta (Cocoindia and Ede nwachukwu) to the isolates of the corm rot pathogens was tested.

[1]. Adebowale, K.O., and Lawal, O.S. (2002b). Effect of annealing and heat moisture conditioning on the physiochemical characteristics of Bambara groundnut Voandzeia substerran starch. Nahrung/Food, 46, 311 – 316.
[2]. Arene, O. B. and Okpala, E. U. (1981) A Disease of Cocoyam in Nigeria caused by Corticium rolfsil. In: Tropical Root Crops: Research Strategies for the 1980s by Terry; E.R, Oduro, K.A. and F. Caveness (eds). Proc. Of the 1st Triennial Root Crops Symposium of the Intern. Soc. Trop, Root Crops, African Branch, Ibadan, Nigeria.
[3]. Barnett, H.L. (1965). Illustrated Genera of Imperfect fungi. 2nd Edition. Burgess Publishing Co., Minneapolis.
[4]. FAO. (1991). Qualerty Bulletin of Statistics of the Food and Agriculture Organization of the United Nations (Vol. 4).
[5]. Federal Office of Statistics (1978) Annual Report, Lagos, Nigeria.

ABSTRACT: The present study includes detailed observations on the male genitalia of subfamily Zygopinae belonging to six tribes. Out of the six tribes studied, Isorhynchini and Coryssomerini are exceptional in lacking parameres while the remaining four tribes viz., Lobotrachelini, Mecopini, Othippiini and Sphadasmini show the presence of parameral processes. The variations relate to the shape of aedeagus, length of aedeagal and phallobasic apodeme and structure of gastral spiculum. The presence or absence of parameral processes of the phallobase also provides useful demarcative structures.

Keywords: Curculionidae, Genitalia , Phylogenetic , Tribe, Zygopinae

[1]. R. G. Oberprieler, A. E Marvaldi , And R. S Anderson. Weevils, Weevils , Weevils Everywhere ,Zootaxa 1668, 2007,491-520
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ABSTRACT: wo Trichoderma isolates viz., T. harzianum Th4 with fast radial growth, simultaneous lysis and over growth on Sclerotium rolfsii and T. virens Tv5 with slow radial growth over S. rolfsii and subsequent lysis were evaluated for their antagonistic potential in vitro. Volatile metabolites of Tv5 isolate were more effective against S. rolfsii growth (54.6% inhibition) compared to Th4 (16.3% inhibition) while non volatile metabolites of Th4 were more effective against S. rolfsii with 100% growth inhibition at 60 and 80% concentration compared to 69.3% inhibition at 80% concentration of Tv5 culture filtrate.

Key words : Antagonism, Trichoderma, Sclerotium rolfsii, Volatiles, and Non volatiles.

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[3]. Elad Y, Chet I and Katan I. 1980. Trichoderma harzianum a biocontrol agent effective against Sclerotium rolfsii and Rhizoctonia solani. Phytopathology 70: 119-121.
[4]. Jash S and Pan S 2007. Variability in antagonistic activity and root colonizing behavour of Trichoderma isolates. Journal of Tropical Agriculture 45(1-2): 29-35.
[5]. Nene Y L and Thapliyal P N 1982. Fungicide in Plant Diseases Control, Oxford and IBH Publishing Co. Pvt. Ltd. New Delhi; 325p