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Titolo:
INSECTICIDAL TOXICITY OF NEEM SEED KERNEL EXTRACT (NSKE) ON BACTROCERA-TRYONI (FROGG.) (DIPTERA, TEPHRITIDAE) AND REPELLENCY ON PERSIMMON FRUIT
Autore:
HASSAN E;
Indirizzi:
UNIV QUEENSLAND,GATTON COLL LAWES QLD 4343 AUSTRALIA
Titolo Testata:
Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz (1970)
fascicolo: 4, volume: 105, anno: 1998,
pagine: 411 - 416
SICI:
0340-8159(1998)105:4<411:ITONSK>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Keywords:
TOXICITY; REPELLENCY; NEEM SEED KERNEL EXTRACT; QUEENSLAND FRUIT FLY; DIMETHOATE; PERSIMMON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
E. Hassan, "INSECTICIDAL TOXICITY OF NEEM SEED KERNEL EXTRACT (NSKE) ON BACTROCERA-TRYONI (FROGG.) (DIPTERA, TEPHRITIDAE) AND REPELLENCY ON PERSIMMON FRUIT", Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz (1970), 105(4), 1998, pp. 411-416

Abstract

A methanolic neem seed kernel extract (NSKE), active ingredient 7 % azadirachtin, was evaluated on persimmon Diospyros kaki for its efficacy against developmental stages of the Queensland Fruit Fly (QFF). One hundred in vitro eggs, each larval instar and pupa were tested for toxicity. Test insects were dipped in an aqueous solution of NSKE for 60 s at 60, 100, 120 or 140 mg/l; a standard fruit fly treatment of a 60 s dip in 400 mg/l dimethoate, was included for comparison. Eggs and immature stages were reared on carrot media at 26 degrees C before and after treatment until adults emerged. Pupae were held at 26 degrees C on moist filter paper until eclosion. Emerged adults were used as the basis to evaluate survival. NSKE was significantly effective (P = 0.01)at 120 and 140 mg/l, on first and second instar larvae compared to notreatment. The mortality of NSKE was not significant at 80 mg/l or 100 mg/l for eggs and third instars. A high proportion of adults emerging from the treated pupae showed wing deformation preventing them from flying. Dimethoate was significantly effective (P = 0.01) for all stages. Tests were done on adults of QFF on persimmons to rest the repellency effect of methanolic NSKE using the same dilution rate. Fruits were dipped in extracts for 60 s and subsequently exposed to caged, mature adult flies for 2 h. Untreated fruits (control) were dipped in waterand exposed to the adult flies concurrently. The repellency effect ofNSKE was measured by counting the number of egg-batches oviposited byfemale QFF.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 16:00:31