Antibiosis of Four Insect-resistant Soybean Genotypes to the Soybean Looper (Lepidoptera: Noctuidae)

Larvae of the soybean looper (SBL), Pseudoplusia includens (Walker), were reared on three food types: soybean, Glycine max (L.) Merrill, genotypes ‘Kirby’ (insect susceptible) and GatIR 81-296 (insect resistant), and Florida beggarweed, (Desmodium tortuosum (Swartz) de Candolle. Larval development was longest on GatIR 81-296 (16.7 days) followed by beggarweed (15.5 days) and Kirby (14.1 days). Total consumption and relative consumption rate by ultimate (6th) instar SBL were significantly greatest on Kirby with no difference noted in consumption between GatIR 81-296 and beggarweed. However, approximate digestibility and efficiency of conversion of ingested food by ultimate instars were significantly greatest on beggarweed compared with the two soybean genotypes. Ultimate instar weight gain and growth rate were similar for larvae restricted to Kirby and beggarweed, while larvae restricted to GatIR 81-296 had significantly reduced weight gain and growth rate. Pupal weights of individuals reared on GatIR 81-296 also were significantly reduced compared with those in the Kirby and beggarweed treatments. SBL larvae consumed less beggarweed foliage (mg dry weight) than Kirby soybean, yet compensated to some extent by utilizing beggarweed foliage more efficiently. Beggarweed proved to be a better source of larval nutrition for SBL than the insect-resistant soybean genotype GatIR 81-296.

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Influence of Three Soybean Genotypes on Development of Voria ruralis (Diptera: Tachinidae) and on Foliage Consumption by Its Host, the Soybean Looper (Lepidoptera: Noctuidae)

Florida Entomologist ◽

10.2307/3494872 ◽

1985 ◽

Vol 68 (4) ◽

pp. 672 ◽

Cited By ~ 2

Author(s):

J. F. Grant ◽

M. Shepard

Keyword(s):

Soybean Genotypes ◽

Soybean Looper ◽

Lepidoptera Noctuidae

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Preimaginal Development of Cotesia marginiventris (Hymenoptera: Braconidae) in Soybean Looper (Lepidoptera: Noctuidae) on Insect-Resistant Soybean Genotypes2

Journal of Entomological Science ◽

10.18474/0749-8004-26.4.381 ◽

1991 ◽

Vol 26 (4) ◽

pp. 381-389 ◽

Cited By ~ 1

Author(s):

G. S. McCutcheon ◽

M. J. Sullivan ◽

S. G. Turnipseed

Keyword(s):

Developmental Time ◽

Cotesia Marginiventris ◽

Soybean Genotype ◽

Breeding Lines ◽

Preimaginal Development ◽

Soybean Genotypes ◽

Glycine Max L ◽

Soybean Looper ◽

Lepidoptera Noctuidae ◽

Resistant Genotypes

The preimaginal development of the parasitoid Cotesia marginiventris (Cresson) was observed in soybean looper, Pseudoplusia includens Walker, on different genotypes of soybean, Glycine max (L.) Merrill. Larvae were reared from eclosion on resistant soybean breeding lines, ED73-371 and D75-10230, both having PI 229358 as the resistance source, or on susceptible cultivars, ‘Bragg’ and ‘Braxton.’ Parasitized larvae consumed less foliage than nonparasitized larvae. Parasitized larvae, regardless of soybean genotype, also weighed less than nonparasitized larvae that fed on susceptible varieties. The developmental time of C. marginventris intrahost was not affected by the hosts' feeding on resistant germplasm. In field cages which contained only one of the soybean genotypes (no choice), parasitization of soybean looper among soybean genotypes was significantly greater in loopers collected from resistant genotypes for one generation during 1986. The resistant genotypes also had greater percentages of undeveloped parasitoids.

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Foliage Consumption and Developmental Parameters of the Soybean Looper and the Velvetbean Caterpillar (Lepidoptera: Noctuidae) Reared on Susceptible and Resistant Soybean Genotypes

Journal of Economic Entomology ◽

10.1093/jee/81.1.310 ◽

1988 ◽

Vol 81 (1) ◽

pp. 310-316 ◽

Cited By ~ 20

Author(s):

R. Mark Beach ◽

James W. Todd

Keyword(s):

Velvetbean Caterpillar ◽

Developmental Parameters ◽

Soybean Genotypes ◽

Soybean Looper ◽

Lepidoptera Noctuidae

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Interactions among insect-resistant soybean genotypes extracts with populations of Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae) susceptible and resistant to its nucleopolyhedrovirus

Anais da Academia Brasileira de Ciências ◽

10.1590/s0001-37652009000400021 ◽

2009 ◽

Vol 81 (4) ◽

pp. 861-871 ◽

Cited By ~ 3

Author(s):

Giorla C. Piubelli ◽

Flávio Moscardi ◽

Clara B. Hoffmann-Campo

Keyword(s):

Control Diet ◽

Harmful Effect ◽

Anticarsia Gemmatalis ◽

Pupal Weight ◽

Leaf Extracts ◽

Resistant Genotype ◽

Biological Insecticide ◽

Soybean Genotypes ◽

Diet Control ◽

Lepidoptera Noctuidae

Anticarsia gemmatalis nucleopolyhedrovirus (AgMNPV) is being used in Brazil as a biological insecticide. Host plant resistance of soybean to insects is been searched for and some authors have mentioned the interference of plant chemistry in virus efficiency. Interactions among soybean extracts of genotypes used as a source of resistance (PI 274454 and PI 227687) with different AgMNPV concentrations in populations of A. geatalis susceptible (S) and resistant (R) to the virus were studied at laboratory condition. Higher mortality was observed when larvae fed on diets with extracts of the soybean genotypes compared with those fed on a plain diet (control). The mean lethal concentration (LC50) was reduced about 10 ties in the S-population fed on diets containing PI 274454 extracts and different concentrations of AgMNPV, compared to control diet. Additive effect was predominantly observed when larvae fed on diets with extracts of soybean genotypes (PI 274454 and PI 227687) and AgMNPV for both larval populations. The pupal weight was negatively influenced by the extracts incorporated to the diets compared to control, for both larval populations, notably for R-population. The results suggest that, in general, leaf extracts of soybean resistant genotype did not cause any harmful effect on virus efficiency.

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