Which is an Oligophagous pest?
Which is an Oligophagous pest?
Feeding on a limited number of foods, usually within one taxonomic family. An oligophagous pest of leguminous plants. Feeding upon a limited variety of food, as certain caterpillars whose diet is restricted to a few related plants.
What are the example of phytophagous insects?
The most important phytophagous families of flies are Cecidomyiidae (gall flies), Agromyzidae (leaf miners) and Tephritidae (fruit flies). Amongst the Hymenoptera, all Symphyta (sawflies and related insects) are plant feeders, while gall wasps occur in the Cynipoidea.
What are insects herbivores?
Animals that feed on plant tissues or plant products are often called herbivores. This term applies not only to insects that injure a plant by chewing leaves or sucking sap but also to more benign species who only collect pollen, nectar, or plant resins.
What is a phytophagous insect?
Phytophagous insects are generally considered to be those that feed on green plants. They include species that attack roots, stems, leaves, flowers, and fruits, either as larvae or as adults or in both stages. Polyphagous species are those that use plants in several to many plant families.
What is difference between insect and pest?
A pest is a broad term that is defined as any living creature that is undesirable to have present because of some unpleasant feature (they are destructive, unpleasant or damaging in some type of way). Insects can be classified as pests as well as animals like rodents and birds, fungus, and even weed plants.
What is a specialist insect?
Generalist insect can be defined those insect which use use wide range of plant species as their host, whereas the specialist insect using a specified range of host plants in their life stages. Again phytophagous insects are differentiated into three categories such as monophagous, oligophagous and polyphagous.
What percentage of insects are Phytophagous?
Phytophagous insects are highly diverse and the total species number is at least 500,000. This represents about 25% of known multicellular animals.
Which is omnivorous insect?
Omnivores are animals whose diet is primarily composed of a mixture of plant and animal matter. Some species of cricket (Order Orthoptera) are omnivorous and will eat both plant material and also smaller insects. Many species of earwig (Order Dermaptera) are also omnivorous. A male earwig.
What are herbivores give example?
Examples of large herbivores include cows, elk, and buffalo. These animals eat grass, tree bark, aquatic vegetation, and shrubby growth. Herbivores can also be medium-sized animals such as sheep and goats, which eat shrubby vegetation and grasses. Small herbivores include rabbits, chipmunks, squirrels, and mice.
What are the examples of pests?
7.1 Major pests
- 7.1.1 Fruit borers.
- 7.1.2 Fruit-piercing moths.
- 7.1.3 Leaf-feeding caterpillars.
- 7.1.4 Leafrollers.
- 7.1.5 Beetle borers.
- 7.1.6 Scarab beetles.
- 7.1.7 Soft scales.
- 7.1.8 Bugs.
Which insect is a pest?
A pest is a small destructive organism that usually attack crops, animals and food. Common examples of pests include cockroaches, mites, ticks, mosquitoes, bed bugs, lice, nematodes, plants, birds, thrips, and termites.
Are insects specialists?
Specialization character of phytophagous insects is one of the key examples of insect-plant relationship. Host specificity of insect is required for their larval development. Several factors like trade-off, characteristics of host plant, insect’s neural system are responsible to an insect for becoming a specialist.
What kind of insects are monophagous and oligophagos?
Tryporyza incertulus is a monophagous pest and attacks only on paddy plants. Oligophagous Pests– are insects confine their feeding activity to plants belonging to one taxonomic group i.e., one family.
Which is an example of a polyphagous pest?
A well known example is the cabbage butterfly. Polyphagous Pests- insects feed on a variety of cultivated crop plants. Schistocerca gregaria, Locusta migratoria are polyphagous insect pests.
How many species of phytophagous insects are there?
In the Coleoptera about 140 000 species are phytophagous and most of these are in two superfamilies, the Chrysomeloidea that include well known agricultural pests like the Colorado potato beetle (Leptinotarsa decemlineata), and the Curculionidae, weevils.
Which is the most important family of flies?
The most important phytophagous families of flies are Cecidomyiidae (gall flies), Agromyzidae (leaf miners) and Tephritidae (fruit flies). Amongst the Hymenoptera, all Symphyta (sawflies and related insects) are plant feeders, while gall wasps occur in the Cynipoidea.