Insect Pests of Leafy Vegetables in Rivers State, Nigeria: I. Feeding Habits and Infestation of the Bitterleaf Weevil Lixus camerunus Kolbe (Coleoptera: Curculionidae)

Okiwelu, S. N.; Ndome, C. B.; Ide, Yoichi

doi:10.1017/s1742758400011140

Int. J. Trop. Insect Sci.

1988

DOI: 10.1017/s1742758400011140

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Insect Pests of Leafy Vegetables in Rivers State, Nigeria: I. Feeding Habits and Infestation of the Bitterleaf Weevil Lixus camerunus Kolbe (Coleoptera: Curculionidae)

S. N. Okiwelu

C. B. Ndome

Yoichi Ide

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2013

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“…T occidentalis is grown across the low land humid tropics of West Africa and can tolerate elevations of up to 1000 m and a wide range of soil conditions (Anonymous, 2004). However, fertile soils with good moisture retaining capacity are preferable (Ok iwclu and Ugwa, 1992). The seeds of flutcd pumpkin are sown directly in planting holes or on beds.…”

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Insect Pests of Fluted pumpkin (Telfairia occidentalis Hook.E) and Their Control with. Neem seed Extracts in Owerri West Area of Imo State

OJIAKO,,

OPARAEKE-AMADI,

ECHEROBIA

et al. 2013

NJE

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Field experiments were conducted to determine the insect pests of fluted pumpkin, Telfairia occidentalis at different stages of plant growth and their control with neem (Azadirachta indica A. Juss) seed extract. At different stages of growth, the crop was predominantly attacked by grasshoppers such as Zonocerus variegatus Linnaeus and Oedaleus nigeriensis Uvarov. During the early stage of growth (1-4 weeks after transplanting (WAT)), Z variegatus had the highest incidence (1.70 insects) followed by O. nigeriensis (1.60), Pachnoda marginella Fabricus (1.10), Lagria villosa Fabricius (0.80), Homorocoryphus nitidulus Vicinus (0.70) and Epilachna chrysomelina Fabricus (0.50) in that order. Z. variegatus and O. nigeriensis also recorded the highest mean numbers at 5 – 8 and 9 – 12 WAT,which indicated their abundance in the field. Unsprayed plots had higher mean number of insects than plots sprayed with crude neem extracts. At 5 – 8 and 9 -12 WAT, unsprayed plots had the highest mean number of insect pests (16.80 and 17.30) as against the plots sprayed with neem extracts (9.90 and 13.30) respectively. At 10 WAT, the unsprayed plots also had the highest mean number of damaged leaves (4.80) when compared with plots sprayed with neem extract (2.0). It can, therefore, be safely inferred that Z. variegatus, O. nigeriensis, P marginella and L. villosa are the major insect pests of T. occidentalis in Owerri West Area of lmo State which incidence could be greatly reduced by the application of neem seed extracts.

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confidence: 99%

Insect Pests of Fluted pumpkin (Telfairia occidentalis Hook.E) and Their Control with. Neem seed Extracts in Owerri West Area of Imo State

OJIAKO,,

OPARAEKE-AMADI,

ECHEROBIA

et al. 2013

NJE

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Insect Pests of Leafy Vegetables in Rivers State, Nigeria: I. Feeding Habits and Infestation of the Bitterleaf Weevil Lixus camerunus Kolbe (Coleoptera: Curculionidae)

Cited by 1 publication

References 4 publications

Insect Pests of Fluted pumpkin (Telfairia occidentalis Hook.E) and Their Control with. Neem seed Extracts in Owerri West Area of Imo State

Insect Pests of Fluted pumpkin (Telfairia occidentalis Hook.E) and Their Control with. Neem seed Extracts in Owerri West Area of Imo State

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