Determination of Economic Injury Level of the Stem Borer, Chilo Partellus (Swinhoe) in Maize, Zea Mays L.

Reddy, K. V. Seshu; Sum, Kiu

doi:10.1017/s1742758400020786

Cited by 14 publications

(8 citation statements)

References 11 publications

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“…The data suggest the presence of good sources of parasitoids close to the crop complemented tolerance of the varieties to the AfRGM. Similar trends have been observed by other workers (Seshu Reddy and Sum 1991;Skovgard and Pats 1997), though there exist Table 2. Correlation between Paspalum galls and parasitism by P. diplosisae and A. procerae, Abakaliki, Nigeria.…”

Section: Biocontrol Science and Technology 1077supporting

confidence: 90%

Parasitoid biodiversity conservation for sustainable management of the African rice gall midge,Orseolia oryzivora(Diptera: Cecidomyiidae) in lowland rice

Nwilene¹,

Togola

Agunbiade³

et al. 2008

Biocontrol Science and Technology

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Section: Biocontrol Science and Technology 1077supporting

confidence: 90%

Parasitoid biodiversity conservation for sustainable management of the African rice gall midge,Orseolia oryzivora(Diptera: Cecidomyiidae) in lowland rice

Nwilene¹,

Togola

Agunbiade³

et al. 2008

Biocontrol Science and Technology

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“…Seshu Reddy & Sum (1992) defined economic injury levels for C. partellus in three varieties of maize by infesting plants of four different ages (21,28,35, and 42 days after plant emergence) with newly hatched larvae. Using the cost of Dipterex as a basis for calculations, they found that the economic injury level varied from 0.66 to 1.41 larvae per plant depending on variety and plant age.…”

Section: Discussionmentioning

confidence: 99%

“…Reliable sampling methods for stem borers are needed not only for the current studies, but also for decision making in an integrated pest management (IPM) context. Current control recommendations include the use of pesticides (Warui & Kuria, 1983), and an economic injury level has been defined for maize (Seshu Reddy & Sum, 1992). For research purposes, enumerative counts of insects based on destructive plant sampling are usually necessary, particularly for ecological studies where accurate identification of the pest species and estimation of levels of parasitism and predation are paramount.…”

Section: Introductionmentioning

confidence: 99%

Distribution and sampling of Chilo partellus (Lepidoptera: Pyralidae) in maize and sorghum on the Kenya coast

Overholt

Ogedah

Lammers

1994

Bull. Entomol. Res.

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The seasonal occurrence and spatial distribution of the crambine stem borer, Chilo partellus (Swinhoe) were investigated in maize, Zea mays, and sorghum, Sorghum bicolor, fields at the Kenya coast. During the vegetative growth stage, small-sized larvae were typically found behind leaf sheaths and in whorls in maize and sorghum. In reproductive and senescent maize, small-sized larvae were also found feeding in ears. Later immature life stages were located predominantly in stems in sorghum, and in the stems and ears in maize. Density and variance estimates of small, medium-, and large-sized larvae and pupae in maize and sorghum were fitted to Taylor's power law which provided significant regressions in all cases. The between-plant distribution was aggregated in all life stages. In maize, the distribution remained aggregated through the larval and pupal life stages, but in sorghum the distribution became progressively less aggregated as insects aged. The relationship of C. partellus density to the proportion of plants infested also suggested aggregation. Optimal sample sizes were determined for both binomial and enumerative sampling plans at two levels of precision, and a discussion is included on the relationship of optimal sample sizes to economic injury levels. Additionally, a presence/absence sequential sampling plan is proposed.

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“…Alghali (1992) showed that yield loss due to stem borers damage is influenced by the cultivar, and by the time and number of larvae involved in infestation. Seshu Reddy and Sum (1991), found a linear relationship between infestation and yield loss, and that the extent of loss increased with earlier infestations.…”

Section: Introductionmentioning

confidence: 95%

Management of stem borers on some quality protein maize varieties

Bamaiyi

Oniemayin

2011

J AGR SCI BELGRADE

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Four Quality Protein Maize (QPM) varieties: Dent, Sakatifu, Flint, Sammaz 14 and TZEE (Local Check) were evaluated for their response to stem borers. Furadan 3G was applied at the rate of 20 kg/ha at planting for the control of the stem borers. The stem borers damage was assessed by determining the number of leaves with ‘windows’ and plants with ‘deadhearts’. The number of exit holes and tunnels on the stem were also determined and the tunnel length measured. Varieties Dent and Sakatifu had more windows, deadhearts, exit holes, tunnels and longer tunnel lengths than varieties Flint and Sammaz 14. The Furadan treatment reduced the borers infestation and increased the yield of the QPM varieties. Varieties Sakatifu and Dent were found to be more susceptible with tunnel lengths of 8.17 and 5.53 cm respectively. Sammaz 14 and Flint were found to be more tolerant to the stem borers infestation and gave the best yields of 3.19 and 2.95 tons/hectare respectively which were not significantly different from TZEE (check)

show abstract

Determination of Economic Injury Level of the Stem Borer, Chilo Partellus (Swinhoe) in Maize, Zea Mays L.

Cited by 14 publications

References 11 publications

Parasitoid biodiversity conservation for sustainable management of the African rice gall midge,Orseolia oryzivora(Diptera: Cecidomyiidae) in lowland rice

Parasitoid biodiversity conservation for sustainable management of the African rice gall midge,Orseolia oryzivora(Diptera: Cecidomyiidae) in lowland rice

Distribution and sampling of Chilo partellus (Lepidoptera: Pyralidae) in maize and sorghum on the Kenya coast

Management of stem borers on some quality protein maize varieties

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