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Registro Completo
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: |
-- |
Marc: |
LEADER 02215naa a2200277 a 4500 001 1552778 005 1997-04-28 008 1996 bl --- 0-- u #d 100 1 $aSHARMA, R. D. 245 $aEffects of Bacillus spp.$btoxins on oviposition and juvenile hatching of Heterodera glycines. 260 $c1996 520 $aThe 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. 650 $ahatching 650 $alarvae 650 $aoviposition 650 $atoxins 650 $aCerrado 650 $aEclosão 650 $aHeterodera Glycines 650 $aLarva 650 $aToxina 653 $aBacillus 653 $aNematoide de cisto da soja 653 $aSoybean cyst nematode 700 1 $aGOMES, A. C. 773 $tNematologia Brasileira$gv.20, n.1, p.53-62, 1996.
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