Question: Which is the total stem parasitic weed?
Options:
2
Loranthus
Cuscuta
Striga
Key Points
The parasite weeds are either total or partial.
The weeds that depend completely on the host plant are termed as total parasites while the weeds that partially depend on the host plant for minerals and are capable of preparing their food from the green leaves are called partial parasites.
Those parasites that attack roots are termed root parasites and those that attack shoots of other plants are called stem parasites.
Additional Information
Types of parasitic weeds:
Total root parasite:Â Orabanche cernua on Tobacco
Partial root parasite:Â Striga lutea on sugarcane and sorghum
Total stem parasite:Â Cuscuta chinensis on lucerne and onion
Partial stem parasite:Â Cassytha filiformis on orange trees and Loranthus longiflorus on mango and other trees.
The parasite weeds are either total or partial.
The weeds that depend completely on the host plant are termed as total parasites while the weeds that partially depend on the host plant for minerals and are capable of preparing their food from the green leaves are called partial parasites.
Those parasites that attack roots are termed root parasites and those that attack shoots of other plants are called stem parasites.
Additional Information
Types of parasitic weeds:
Total root parasite:Â Orabanche cernua on Tobacco
Partial root parasite:Â Striga lutea on sugarcane and sorghum
Total stem parasite:Â Cuscuta chinensis on lucerne and onion
Partial stem parasite:Â Cassytha filiformis on orange trees and Loranthus longiflorus on mango and other trees.