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Titolo:
LABORATORY AND FIELD EFFICACY OF NEEM (AZADIRACHTA-INDICA-A JUSS) EXTRACTS AGAINST 2 BROCCOLI PESTS
Autore:
PRIJONO D; HASSAN E;
Indirizzi:
BOGOR AGR UNIV,FAC AGR,DEPT PLANT PESTS & DIS BOGOR 16144 INDONESIA UNIV QUEENSLAND,GATTON COLL,DEPT PLANT PROD LAWES QLD 4343 AUSTRALIA
Titolo Testata:
Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz
fascicolo: 4, volume: 100, anno: 1993,
pagine: 354 - 370
SICI:
0340-8159(1993)100:4<354:LAFEON>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
INSECT;
Keywords:
NEEM EXTRACT; AZADIRACHTA INDICA; CABBAGE WEB WORM; CROCIDOLOMIA BINOTALIS; DIAMONDBACK MOTH; PLUTELLA XYLOSTELLA; BROCCOLI;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
D. Prijono e E. Hassan, "LABORATORY AND FIELD EFFICACY OF NEEM (AZADIRACHTA-INDICA-A JUSS) EXTRACTS AGAINST 2 BROCCOLI PESTS", Zeitschrift fur Pflanzenkrankheiten und Pflanzenschutz, 100(4), 1993, pp. 354-370

Abstract

This study was conducted to test the growth-regulating activity of neem extract on the cabbage webworm Crocidolomia binotalis Zeller (Lepidoptera: Pryralidae) and to evaluate the field efficacy of the extract against the diamondback moth Plutella xylostella (L. ) (Lepidoptera: Yponomeutidae) and against C. binotalis on broccoli plants. In the laboratory, third- and fourth-inst ar larvae of C. binotalis were fed broccoli leaves treated with neem extract or azadirachtin for 24 h and 48 h, respectively, and then their development: was followed until pupation or adult emergence. Metamorphic effects of neem extract on the fourth instar in the course of its development to the adult stage were classified into five categories: 1) the fourth-instar larva died before orduring pupation, 2) malformed pupa, 3) the larva successfully pupatedbut died before adult emergence, 4) malformed adult or the adult did not eclose completely from the pupal case, and 5) normal adult. The quantitative data for these effects were subjected to polytomous binary response analysis based on the conditional binomial model. The resultsrevealed that the conditional probability of occurrence of the effectin all categories was concentration-dependent, and this suggests thatneem extract exerts strong metamorphic disturbances in the development of the test insect. The median moulting inhibitory concentration (IC50) of neem extract: and azadirachtin against the third instar was 0.27 % and 43.9 mu g/l, respectively, and that of neem extract against the fourth instar was 0.065 %. In the field, the treatment with neem oil(azadirachtin: 2.5 % w/v) at rates of 1.8, 2.4 and 3.0 l/ha provided comparable protection to broccoli plants from infestation by P. xylostella as that with Sumicidin 200 EC (fenvalerate 50 g/ha). In addition,the same treatments could check, though not completely, the build-up of C. binotalis population and markedly reduced the damage on broccoliheads.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 17/01/20 alle ore 20:13:34