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pro vyhledávání: '"E U, Iheagwam"'
Autor:
E. U. Iheagwam
Publikováno v:
Zeitschrift für Angewandte Entomologie. 91:149-154
Studies on the immature stages of the variegated grasshopper, Zonocerus variegatus, showed that eggs laid in April by dry-season generation females hatch from the third week of October through November while eggs laid in May and June hatch by the sec
Autor:
E. U. Iheagwam
Publikováno v:
Zeitschrift für Angewandte Entomologie. 96:10-15
Eggs laid by adults of Zonocerus variegatus which were collected as late instar nymphs from the field in August and September 1981, hatched between mid-November 1981 and early April 1982, thus confirming earlier speculations and suggestions of some a
Autor:
E. U. Iheagwam
Publikováno v:
Zeitschrift für Angewandte Entomologie. 91:349-354
Studies were made in the laboratory on the effects of weight of insect, leaf age, leaf hardness (penetrability), and nitrogen content of leaves of cabbage on the fecundity of the cabbage whitefly, Aleyrodes brassicae. The fecundity of the whitefly wa
Autor:
M. C. Eluwa, E. U. Iheagwam
Publikováno v:
Deutsche Entomologische Zeitschrift. 30:17-22
The durations of eggs, nymphs and immature adults of the cassava mealybug, Phenacoccus manihoti Mat-Ferr. were determined at 3–4 constant temperatures. The duration of development of each stage decreased with increase in temperature. The rate of de
Autor:
E. U. Iheagwam
Publikováno v:
Deutsche Entomologische Zeitschrift. 32:55-58
Studies on the hatching patterns of the grasshopper pest, Zonocerus variegatus L., showed that in the 1981/82 breeding season, the dry season generation hatched from October, 1981 to November, 1981, while the wet season generation hatched from about
Autor:
E. U. Iheagwam
Publikováno v:
Bulletin of Entomological Research. 70:533-536
At Nsukka in south-eastern Nigeria, nymphs of the wet-and dry-season generations of Zonocerus variegatus (L.) overlapped, both in time (January to March) and in space. Contrary to some previous suggestions, adults of the two generations also overlapp
Autor:
E. U. Iheagwam
Publikováno v:
Deutsche Entomologische Zeitschrift. 33:71-73
The water yam, Dioscorea alata L. is attacked in storage by a complex of insects. These include Dasyses incrustata MEYRICK and Setamorpha rutella ZELLER (Tineidae), the former being reported for the first time as a pest of yam; one species of Pyralid
Autor:
E. U. Iheagwam
Publikováno v:
Entomologia Experimentalis et Applicata. 34:339-341
Autor:
E U, Iheagwam, F C, Okafor
Publikováno v:
Beitrage zur tropischen Landwirtschaft und Veterinarmedizin. 22(4)
Two tables and a figure are used to present the epidemiological and epizoological particulars of Bulinus globosus and Lymnaea natalensis, the intermediate hosts of Schistosoma haematobium and Fasciola gigantica in Southeastern Nigeria. Possible ways
Autor:
E. U. Iheagwam
Publikováno v:
Oikos. 36:233
Leaf age had a profound effect on the survival of the cabbage whitefly, Aleyrodes brassicae Walk. Young leaves were more favourable for both total and maximum fecundities than were mature leaves. The variety "Earliest" elicited the highest number of