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Grasshoppers : life cycle, damage assessment and management strategy

Description

Descriptions of clear-winged, Packard's, two-striped and migratory grasshoppers.

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Cabbage thrips in Alberta

Description

In recent years, an increase in the incidence of bronzing and roughened leaf texture on cabbages grown in southern Alberta has sometimes made the cabbages unacceptable for either the fresh or... More ≫

Description

In recent years, an increase in the incidence of bronzing and roughened leaf texture on cabbages grown in southern Alberta has sometimes made the cabbages unacceptable for either the fresh or processing market. This damage is associated with high populations of thrips, tiny insects that feed by rasping and piercing the outer cell layers of the leaves and ingesting the exposed cell contents. The damaged tissue desiccates and allows the entry of disease organisms. When thrips feed, they leave small black specks (fecal pellets) on the injured plant parts.

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Natural enemies of field crop insect pests in Alberta

Description

This fact sheet describes some of the pathogens (diseases), insect predators and parasites attacking field crop insect pests. Natural enemies are those organisms that help control population... More ≫

Description

This fact sheet describes some of the pathogens (diseases), insect predators and parasites attacking field crop insect pests. Natural enemies are those organisms that help control population levels of pest insects. Predatory insects, such as the lady beetles, eat many prey insects during their development. Lady beetles are just one example of the many different insects that prey, in both larval and adult stages, on other insects. Blister beetles, on the other hand, are predacious only as larvae; the adults are foliage feeders.

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Lygus bugs in Canada

Description

Lygus bugs are small, oval-shaped insects that feed on a variety of crops and weeds. Several species infest canola and alfalfa. This fact sheet includes a brief description of the bugs, identifies... More ≫

Description

Lygus bugs are small, oval-shaped insects that feed on a variety of crops and weeds. Several species infest canola and alfalfa. This fact sheet includes a brief description of the bugs, identifies their host plants, describes their life cycle, describes what type of damage they can cause, and outlines steps to determine when to take action and what methods can be used to manage the insect.

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