Effects of a Companion Plant on the Formation of Mycorrhizal Propagules in Artemisia tridentata Seedlings

Companion planting is a well-known strategy to manage insect pests and support a natural enemy population through vegetative diversification. Trap cropping is one such type of special companion planting strategy that is traditionally used for insect pest management through vegetative diversification used to attract insect pests away from the main crops during a critical time period by providing them an alternative preferred choice. Trap crops not only attract the insects for feeding and oviposition, but also act as a sink for any pathogen that may be a vector. Considerable research has been conducted on different trap crops as companion plant species to develop improved pest management strategies. Despite this, little consensus exists regarding optimal trap cropping systems for diverse pest management situations. An advantage of trap cropping over an artificially released natural enemy-based biological control could be an attractive remedy for natural enemies in cropping systems. Besides, many trap crop species can conserve natural enemies. This secondary effect of attracting natural enemies may be an advantage compared to the conventional means of pest control. However, this additional consideration requires a more knowledge-intensive background to designing an effective trap cropping system. We have provided information based on different trap crops as companion plant, their functions and an updated list of trap cropping applications to attract insect pests and natural enemies that should be proven as helpful in future trap cropping endeavors.

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Responses of Range Grasses to Different Intensities of Competition with Sagebrush (Artemisia Tridentata Nutt.)

Ecology ◽

10.2307/1932913 ◽

1947 ◽

Vol 28 (1) ◽

pp. 1-16 ◽

Cited By ~ 27

Author(s):

Joseph H. Robertson

Keyword(s):

Artemisia Tridentata ◽

Range Grasses

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Evaluation of planting sites common to a southeast Alaska clear-cut. II. Available inoculum of the ectomycorrhizal fungus Cenococcumgeophilum

Canadian Journal of Forest Research ◽

10.1139/x83-002 ◽

1983 ◽

Vol 13 (1) ◽

pp. 9-11 ◽

Cited By ~ 14

Author(s):

Charles G. Shaw III ◽

Roy C. Sidle

Keyword(s):

Bulk Density ◽

Mineral Soil ◽

Soil Bulk Density ◽

Ectomycorrhizal Fungus ◽

Southeast Alaska ◽

Clear Cut ◽

Rotten Wood ◽

Mycorrhizal Propagules ◽

Soil Volume ◽

High Lead

Three microsites common to clear-cuts logged by the high-lead method in southeast Alaska were sampled to quantify the occurrence and viability of sclerotia of Cenococcumgeophilum Fr. Undisturbed duff had significantly greater numbers of sclerotia per gram or per cubic centimetre of soil than either exposed mineral soil or rotten wood. There were significantly fewer viable sclerotia per cubic centimetre of rotten wood than in either exposed mineral soil or undisturbed duff. Numbers of viable sclerotia that could contact the root plug of a containerized seedling when it was planted into rotten wood, exposed mineral soil, or undisturbed duff were calculated to be 0.7, 6.1, and 7.2, respectively. Expressing abundance of mycorrhizal propagules by soil volume, rather than weight, is more meaningful when microsites with large differences in soil bulk density are compared.

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