Efficacy of Maize Varieties and Lambdacot 500EC Concentrations on the Control of Maize Stem Borer (Busseola fusca Fuller) (Lepidoptera: Noctuidae)

AbstractThe pink stem borer (PSB) (Sesamia nonagrioides Lefèbvre, 1827; Lepidoptera: Noctuidae) is the main insect pest of maize (Zea mays L., Poaceae) in the Mediterranean area. Maize varieties partially resistant to PSB have been identified, but few studies have documented the mechanisms of resistance involved. The objectives of this research were to study the levels of leaf and sheath antibiosis of a maize population, EPS12, and determine whether antibiosis improved over the selection process for less stalk tunneling. A hybrid check and two Bacillus thuringiensis (Bt) hybrids were also examined. Several bioassays were carried out in a control chamber to evaluate antibiosis of maize leaves and sheaths against PSB larvae. Leaf antibiosis was significantly higher for EPS12 than for the hybrid check and sheath antibiosis was low for all non-Bt hybrids studied. We conclude that leaf and sheath antibiosis was not significantly improved during the selection process. Future efforts should look for other possible mechanisms of resistance, such as stem rind antibiosis.

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In vitro Evaluation of Aqua Extracts of Some Botanicals against Maize Stem Borer, Busseola fusca F. (Lepidoptera: Noctuidae)

Journal of Plant Pathology & Microbiology ◽

10.4172/2157-7471.1000179 ◽

2015 ◽

Vol 04 (05) ◽

Author(s):

Tadele Shiberu

Keyword(s):

Busseola Fusca ◽

Stem Borer ◽

In Vitro Evaluation ◽

Lepidoptera Noctuidae

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Abundance, dispersion and parasitism of the stem borer Busseola fusca (Lepidoptera: Noctuidae) in maize in the humid forest zone of southern Cameroon

Bulletin of Entomological Research ◽

10.1079/ber2004347 ◽

2005 ◽

Vol 95 (2) ◽

pp. 169-177 ◽

Cited By ~ 19

Author(s):

A. Chabi-Olaye ◽

C. Nolte ◽

F. Schulthess ◽

C. Borgemeister

Keyword(s):

Host Plants ◽

Busseola Fusca ◽

Stem Borer ◽

Forest Zone ◽

Humid Forest ◽

Humid Forest Zone ◽

Short Rainy Season ◽

Southern Cameroon ◽

Egg Parasitism ◽

Lepidoptera Noctuidae

AbstractThis study was conducted in the humid forest zone of Cameroon, in 2002 and 2003. The main objective was to investigate the effects of intercropping on infestation levels and parasitism of the noctuid maize stem borer Busseola fusca Fuller. Two trials were planted per year, one during the long and one during the short rainy season. Maize monocrops were compared with maize/legume or maize/cassava intercrops in two spatial arrangements: maize on alternate hills or in alternate rows. Spatial analyses showed that the stemborer egg batches were regularly dispersed in the maize monocrop and aggregated in the intercrops, as indicated by b, the index of dispersion of Taylor's power law. Depending on the crop association and planting pattern, intercrops reduced the percentage of plants with stem borer eggs by 47.4–58.4% and egg densities by 41.2–54.5% compared to monocropped maize. Consequently, larval densities were 44.4–61.5% lower in intercrops compared to monocrops. Intercropping maize with non-host plants did not affect larval parasitism. Up to two-fold higher levels of egg parasitism by scelionid Telenomus spp. were recorded in inter- compared to monocrops during the short rainy seasons of 2002 and 2003. No differences were found among the mixed cropping treatments and parasitism was lower during the long compared to the short rainy seasons. It was proposed that differences in levels of parasitism were due to density dependence effects rather than the effect of the presence of non-host plants in the system.

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