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| Titel: |
Effects of Adjuvants on Entomopathogenic Nematode Persistence and Efficacy Against Plutella xylostella |
| Auteur: |
Baur, M. E. Kaya, H. K. Gaugler, R. Tabashnik, B. |
| Verschenen in: |
Biocontrol science and technology |
| Paginering: | Jaargang 7 (1997) nr. 4 pagina's 513-526 |
| Jaar: |
1997-12-01 |
| Inhoud: |
The effects of spray additives on entomopathogenic nematode persistence and efficacy against Plutella xylostella (L . ) were studied . Several adjuvants were toxic to radish seedlings ( Raphanus sativus var . capitata L . ) but none was toxic to the nematodes or P. xylostella. In the laboratory , the adjuvants that provided the best antidesiccant activity based on a rank score were TX7719 , Rodspray oil and Nufilm P . Those providing less protection but better than the remaining adjuvants were 38 - F , dextrose and Pluronic F - 127 . In greenhouse trials , TX7719 and Rodspray oil were more effective than the other adjuvants tested . The stilbene brightener , Blankophor BBH , did not increase nematode efficacy consistently in greenhouse trials probably because the concentration used was too low . In field trials , the combination of TX7719 plus Blankophor BBH increased nematode persistence on watercress leaves ( Nasturium officinale R . Br . ) and efficacy against P. xylostella significantly . In vitro- pro duced nematodes benefited more from additives than in vivo- produced nematodes in the laboratory , but that difference was lost in the field . Overall , it was found that additives generally improved nematode persistence and efficacy , but the improvement was probably not sufficient to increase the feasibility of foliar applications of nematodes against P. xylostella. However , further evaluation of adjuvants is warranted for applications of nematodes to watercress for the control of P. xylostella. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 16 gevonden artikelen
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