| Titre : |
Effect of crop management practices on eurystylus immaculatus on sorghum |
| Type de document : |
texte imprimé |
| Auteurs : |
O. Ajayi, Auteur ; R. Tabo, Auteur |
| Année de publication : |
1995 |
| Importance : |
p 233-240 |
| Langues : |
Anglais (eng) |
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
PRATIQUE CULTURALE SORGHO EURYSTYLUS IMMACULATUS |
| Résumé : |
Different crop management practices were examined in relation to the incidence of the head bug eurystylus immaculatus : date of sowing, intercropping, nitrogen levels and plant density. Four dates were tested in 1991. Date of sowing affected the population of E. immaculatus, peak infestation occurred in the mid-july sowing in 1991 and in 3 Jun sowing in 1992. Depending on the sorghum cultivar used, intercropping sorghum with soybean decreased head bug incidence on sorghum by up to 22% in 1989 and by 8-49% in 1991. Both the 1:1 and 1:2 sorghum soybean row arrangements had fewer head bugs than sole sorghum. Intercropping with pigeonpea reduced head bug infestation by 3% averaged over three sorghum and two pigeonpea cultivars. Intercropping sorghum with pearl millet and cowpea had no effect on head bug numbers on ICSV 247 but increased them 2-3 fold on the taller and later-maturing Gaya Early. Significantly more head bugs were found on the compact-headed ICSH 507 than on ICSV 247 but Samsorg 14, a later-maturing variety, had more head bugs than either. Neither variations in plant density between 2.7 and 17.8 plants m-² nor level of nitrogen fertilizer between 0 and 90 kg N ha-² significantly affected head bug populations on sorghum. |
| Numéro du document : |
A 96000/H00 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
PROTECTION DES VEGETAUX |
| Bull2 (Theme secondaire) : |
RAVAGEURS DES PLANTES |
Effect of crop management practices on eurystylus immaculatus on sorghum [texte imprimé] / O. Ajayi, Auteur ; R. Tabo, Auteur . - 1995 . - p 233-240. Langues : Anglais ( eng)
| Catégories : |
SCIENCES AGRICOLES
|
| Mots-clés : |
PRATIQUE CULTURALE SORGHO EURYSTYLUS IMMACULATUS |
| Résumé : |
Different crop management practices were examined in relation to the incidence of the head bug eurystylus immaculatus : date of sowing, intercropping, nitrogen levels and plant density. Four dates were tested in 1991. Date of sowing affected the population of E. immaculatus, peak infestation occurred in the mid-july sowing in 1991 and in 3 Jun sowing in 1992. Depending on the sorghum cultivar used, intercropping sorghum with soybean decreased head bug incidence on sorghum by up to 22% in 1989 and by 8-49% in 1991. Both the 1:1 and 1:2 sorghum soybean row arrangements had fewer head bugs than sole sorghum. Intercropping with pigeonpea reduced head bug infestation by 3% averaged over three sorghum and two pigeonpea cultivars. Intercropping sorghum with pearl millet and cowpea had no effect on head bug numbers on ICSV 247 but increased them 2-3 fold on the taller and later-maturing Gaya Early. Significantly more head bugs were found on the compact-headed ICSH 507 than on ICSV 247 but Samsorg 14, a later-maturing variety, had more head bugs than either. Neither variations in plant density between 2.7 and 17.8 plants m-² nor level of nitrogen fertilizer between 0 and 90 kg N ha-² significantly affected head bug populations on sorghum. |
| Numéro du document : |
A 96000/H00 |
| Niveau Bibliographique : |
2 |
| Bull1 (Theme principale) : |
PROTECTION DES VEGETAUX |
| Bull2 (Theme secondaire) : |
RAVAGEURS DES PLANTES |
|
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