Do differences in inducible resistance explain the population dynamics of birch and pine defoliators?

Seppo Neuvonen; Pekka Niemela

Treesearch

Do differences in inducible resistance explain the population dynamics of birch and pine defoliators?

Informally Refereed

Authors:

Seppo Neuvonen, Pekka Niemela

Year:

1991

Type:

Paper

Station:

Northern Research Station

Source:

In: Baranchikov, Yuri N.; Mattson, William J.; Hain, Fred P.; Payne, Thomas L., eds. Forest Insect Guilds: Patterns of Interaction with Host Trees; 1989 August 13-17; Abakan, Siberia, U.S.S.R. Gen. Tech. Rep. NE-153. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 103-112.

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Abstract

Damage inflicted by insects may trigger responses in their host plants resulting either in immediate effects on herbivores either rapidly or in effects upon subsequent herbivore generations. Differentiation between rapid and delayed inducible resistance is essential since the two responses affect the population dynamics of herbivores in fundamentally different ways (Haukioja 1982). Rapid inducible resistance (RIR) tends to stabilize herbivore population dynamics. On the other hand, delayed inducible resistance (DIR) introduces a time-lag into the negative feedbacks regulating the population dynamics of insects and may generate cyclical fluctuations in density (Benz 1974, Haukioja 1980, Berryman et al. 1987).

Parent Publication

Forest Insect Guilds: Patterns of Interaction with Host Trees

Citation

Neuvonen, Seppo; Niemelä, Pekka. 1991. Do differences in inducible resistance explain the population dynamics of birch and pine defoliators?