Data/hora: 23/09/2024 10:13:17

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	28/04/1997	
Data da última atualização: 	28/04/1997	
Autoria: 	SHARMA, R. D.; GOMES, A. C.	
Título: 	Effects of Bacillus spp.: toxins on oviposition and juvenile hatching of Heterodera glycines.	
Ano de publicação: 	1996	
Fonte/Imprenta: 	Nematologia Brasileira, v.20, n.1, p.53-62, 1996.	
Idioma: 	Inglês	
Conteúdo: 	The effect of delta-endotoxins of Bacillus sphaericus (Bs 2362), B. thuringiensis var. israelensis (Bti-H-14), and B.thuringiensis var. Kurstaki (Btk-HD-1), on oviposition and juvenile hatching of Heterodera glycines race 3 in the absence of a host plant was studied under greenhouse conditions. In experiment 1, a single dose of 1 mg of each toxin and aldicarb/g soil infested with H. glycines were compared with untreated control after intervals of 15, 30 and 60 days. The initial numbers of egs, juveniles and cysts/50g of soil were 4.4, 1.2, and 9.6 respectively. In experiment 2, two doses (0.2 and 2mg of each toxin/g of autoclaved soil) were compared with untreated control 15 days following toxins incorporation in 100g of soil inoculated with 10 cysts. The number of eggs laid at the 1 mg dose of Bs 2362 were significantly (P<0.05) higher than the control after 15 and 60 days in experiment 1 and also in experiment 2, in Bs 2362 at the 0.2 mg dose but at 2 mg dose the number of eggs were significantly (P<0.05) less than the control. In experiment 1, the number of hatched juveniles of H.glycines in treatment Bs 2362 and Btk-HD-1 were significantly (P<0.05) higher than in the untreated control after 15 days but not after 30 and 60 days. In experiment 2, only Btk-HD-1 at 0.2 mg dose had significantly (P<0.05) higher numbers of hatched juveniles than the control. The number of hatched juveniles in Bs 2362 at both doses were significantly less than the control.	
Palavras-Chave: 	Bacillus; Nematoide de cisto da soja; Soybean cyst nematode.	
Thesagro: 	Cerrado; Eclosão; Heterodera Glycines; Larva; Toxina.	
Thesaurus Nal: 	hatching; larvae; oviposition; toxins.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (9722-1) - UPC - SP - -- - CRI4293 -  - CRI4293 - DIS