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Performance of Bemisia tabaci Biotype B on Soybean Genotypes
1Depto de Proteção Vegetal, Fac de Ciências Agronômicas, Univ Estadual Paulista (UNESP), 18610-307, Botucatu, SP, Brasil.
Neotropical Entomology
|September 23, 2016
Summary
Researchers identified soybean genotypes resistant to the silverleaf whitefly (Bemisia tabaci), a major agricultural pest. Some soybean varieties significantly hindered whitefly development, offering a sustainable pest management strategy.
Area of Science:
- Agricultural Entomology
- Plant Breeding
- Integrated Pest Management
Background:
- Bemisia tabaci (Genn.) is a significant pest affecting soybean [Glycine max (L.) Merrill] crops.
- Chemical control of Bemisia tabaci poses environmental concerns.
- Resistant soybean genotypes offer a sustainable alternative for integrated pest management (IPM).
Purpose of the Study:
- To evaluate the biological development of Bemisia tabaci biotype B on 13 soybean genotypes.
- To identify soybean genotypes exhibiting resistance to Bemisia tabaci.
- To assess the impact of insect population history on plant resistance.
Main Methods:
- Greenhouse experiments evaluated nymphal period, complete development period (egg-adult), and nymphal viability.
- Four promising resistant genotypes and one susceptible genotype were selected for further assays.
- Egg viability and incubation periods were assessed using initial and pre-conditioned insect populations.
Main Results:
- Three soybean genotypes ('P98Y11,' 'TMG132 RR,' and UX-2569-159) demonstrated moderate resistance (antibiosis/antixenosis).
- 'P98Y11' and 'TMG132 RR' showed reduced suitability for Bemisia tabaci development, prolonging the life cycle.
- UX-2569-159 induced high nymphal mortality; pre-conditioning insects did not significantly alter resistance levels.
Conclusions:
- Soybean genotypes 'P98Y11,' 'TMG132 RR,' and UX-2569-159 show potential for managing Bemisia tabaci.
- A single generation evaluation is likely sufficient for identifying resistant soybean genotypes.
- These findings support the use of resistant soybean varieties in integrated pest management strategies.
