Screening of African rice, Oryza glaberrima Steud, for resistance to the African rice gall midge Orseolia oryzivora Harris and Gagné

Ukwungwu, M. N.; Williams, C. T.; Okhidievbie, O.

doi:10.1017/s1742758400007827

Cited by 13 publications

(12 citation statements)

References 3 publications

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“…Many management strategies viz., chemical, cultural, biological and planting of resistant cultivars that have resistance to insects are employed to reduce the damage caused by this insect-pest. Among them, the use of resistant rice varieties appears to offer the most effective component for incorporation into an integrated pest management strategy [11]. For this, breeding resistant varieties has been a viable, ecologically acceptable approach for managing this pest [5].…”

Section: Introductionmentioning

confidence: 99%

Screening of different Rice entries against Rice Gall Midge, Orseolia oryzae (Wood-Mason)

Seni¹,

Naik²

2017

IJEAB

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Section: Introductionmentioning

confidence: 99%

Screening of different Rice entries against Rice Gall Midge, Orseolia oryzae (Wood-Mason)

Seni¹,

Naik²

2017

IJEAB

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“…Many of the traditional African sativa lines tested in the screenhouse showed resistance to AfRGM as strong as or stronger than that shown by NHTA 8, one of the most resistant sativa lines identified from previous trials. Nevertheless, even the most resistant of these African sativas ranked as moderately rather than strongly resistant on the SES scale (IRRI, 1996) and did not exhibit the immunity or near‐immunity shown by some lines of Oryza glaberrima in Nigeria (U KWUNGWU et al., 1998; S INGH et al., 1999). Nor did they match the very strong resistance of some Asian sativas to Asian rice gall midge (K ALODE et al., 1977; S AIN and K ALODE , 1994).…”

Section: Discussionmentioning

confidence: 99%

Assessment of host plant resistance in Oryza sativa to the African rice gall midge, Orseolia oryzivora Harris and Gagné (Dipt., Cecidomyiidae), with a description of a new method for screening under artificial infestation

Williams¹,

Ukwungwu²,

Singh³

et al. 2001

J Applied Entomology

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A new method is described for screening rice germplasm for resistance to the African rice gall midge (AfRGM), Orseolia oryzivora, year‐round under conditions similar to a severe natural outbreak, using an AfRGM culture to start infestation in a tunnel screenhouse over an irrigated rice field. During 1996 and 1997, 907 test entries of Oryza sativa were screened. Eighteen entries, 17 of which were traditional African lines, had infestation levels at least 50% below those on the partially resistant check variety NHTA 8 at 63–70 days after transplanting, though none showed very strong resistance. When traditional African lines and improved lines were screened together, the latter were on average markedly more susceptible. A field trial using caged plots indicated that even under no‐choice conditions the varieties NHTA 8 and Eguazankpa maintained their partial resistance relative to the susceptible variety ITA 306. A comparison of the new screenhouse screening method with one using seedlings in insect cages suggested that the latter was less suitable for detecting partial resistance. An experiment in which NHTA 8 and ITA 306 were infested with one to four neonate AfRGM larvae per seedling showed that the difference in resistance between these varieties decreased with increasing infestation pressure. The potential role of partial resistance in the management of AfRGM, and methods for detecting it, are discussed.

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“…In general, yield losses due to insect pests are difficult to quantify due to field and environmental factors and the role of natural enemies of insect pests. African Rice Gall Midge (AfRGM) has been reported to have caused over 80% losses on farmers' field in Abakaliki, Ebonyi state of Nigeria, (Ukwungwu et al, 1998). Yield loss assessments in field with up to 30% tiller infestation suggest that for each 1% increase in tiller infestation, a farmer can expect to lose 2-3% grain yield, (Nacro et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Screening of Inter-Specific Rice Progeny Lines for African Rice Gall Midge (AfRGM) Resistance

Bashir

2012

AJEA

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Nine hundred and seventeen inter-specific rice lines were subjected to field screening for African Rice Midge Resistance in both Rainfed and Irrigated lowland ecologies at Badeggi and Edozhigi experimental fields respectively in 2009 cropping season, to determine the levels of African Rice Gall Midge (AfRGM) resistance in Bc 3 F 3 inter-specific lines. The field was laid out in an Augmented Block Design, comprising of three blocks with 305 progenies in each block. The checks were randomized three times in each block. The result indicated that the progenies differ significantly in their resistance to AfRGM, four progenies were found to be resistance across the two locations. However, 7 out of the 146 progenies that have good phenotypic acceptability were resistant at Badeggi, while 5 out of 122 progenies with phenotypic acceptability were found resistant at Edozhigi location. Considering both resistance and phenotypic acceptability scores, only 16 progenies were selected for yield trial in both locations.

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Screening of African rice, Oryza glaberrima Steud, for resistance to the African rice gall midge Orseolia oryzivora Harris and Gagné

Cited by 13 publications

References 3 publications

Screening of different Rice entries against Rice Gall Midge, Orseolia oryzae (Wood-Mason)

Screening of different Rice entries against Rice Gall Midge, Orseolia oryzae (Wood-Mason)

Assessment of host plant resistance in Oryza sativa to the African rice gall midge, Orseolia oryzivora Harris and Gagné (Dipt., Cecidomyiidae), with a description of a new method for screening under artificial infestation

Screening of Inter-Specific Rice Progeny Lines for African Rice Gall Midge (AfRGM) Resistance

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