EFFECTS OF NEEM (AZADIRACHTA-INDICA) KERNEL WATER EXTRACTS ON CASSAVAMEALYBUG, PHENACOCCUS-MANIHOTI (HOM., PSEUDOCOCCIDAE)

Authors
MOURIER M
Citation
M. Mourier, EFFECTS OF NEEM (AZADIRACHTA-INDICA) KERNEL WATER EXTRACTS ON CASSAVAMEALYBUG, PHENACOCCUS-MANIHOTI (HOM., PSEUDOCOCCIDAE), Journal of applied entomology, 121(4), 1997, pp. 231-236
Citations number
17
Categorie Soggetti
Entomology
Journal title
Journal of applied entomology → ACNP
ISSN journal
09312048
Volume
121
Issue
4
Year of publication
1997
Pages
231 - 236
Database
ISI
SICI code
0931-2048(1997)121:4<231:EON(KW>2.0.ZU;2-M
Abstract
The effect of neem kernel water extract (NKWE) in different concentrat ions on cassava mealybug, Phenacoccus manihoti, was investigated. A ch oice-test showed that neem treated cassava leaves were less attractive to first instar mealybugs than untreated leaves. Mealybugs that start ed feeding on treated leaves died in their second instar. A greenhouse experiment showed that three applications of NKWE at weekly intervals protected cassava against established early instar mealybugs. There w ere no significant differences between concentrations of 1, 10 and 25% . All concentrations were phytotoxic to a varying degree.