Describe the following insect pest; Stem borer,Bean beetle, Aphids, Yam beetles, Variegated grasshopper, cotton stainer,Army worm, Cotton ball worm and Cassava mealybugs under the following headings: i. Crops attacked. ii. Nature of damages and economic importance. iii. Prevention and control measure.
Answers
Answered by
1
Stem borer : I) Rice ii) They can destroy the crops at any stage causing a loss of 20 - 60 % depending upon the kind of insect causing financial loss iii) Raising irrigation water level periodically, removing egg masses found
Bean Beetle: I) Wild legumes, Green beans ii) Damage to leaves and pods, larvae damage the roots - affects the yield iii) Expose to temp above 14 F
Aphids: I) Cereals ii) Suck the sap causing stunting or distortion of plant parts, Economic loss as cereals are consumed all throughout the world iii) Sticky cards to monitor growth, varied use of insecticides to prevent resistance
Yam Beetles: I) Yam ii) Attack tubers, holes in the tubers reduce market price iii) Planting yams as late in the season as possible
Variegated Grasshopper I) Many crops namely Cassava ii) Leaves, petioles and sometimes even on stems iii) Entomopathogenic fungus
Cotton Stainer I) Cotton ii) Damage to fruits iii) Synthetic pyrethroids, carbamates
Army Worm I) Grain Crops, grasses, corn ii) Damage to leaves ii) Grass control before planting
Cotton ball worm I) Cotton, beans, maize ii) Hollowing of internal tissues of the plant iii) Lesser crop density while planting
Cassava mealybugs: I) Cassava and Manihot glaziovii ii) Stunting, leaf distortion iii) Introducing natural enemies like Phenacoccus manihoti
Bean Beetle: I) Wild legumes, Green beans ii) Damage to leaves and pods, larvae damage the roots - affects the yield iii) Expose to temp above 14 F
Aphids: I) Cereals ii) Suck the sap causing stunting or distortion of plant parts, Economic loss as cereals are consumed all throughout the world iii) Sticky cards to monitor growth, varied use of insecticides to prevent resistance
Yam Beetles: I) Yam ii) Attack tubers, holes in the tubers reduce market price iii) Planting yams as late in the season as possible
Variegated Grasshopper I) Many crops namely Cassava ii) Leaves, petioles and sometimes even on stems iii) Entomopathogenic fungus
Cotton Stainer I) Cotton ii) Damage to fruits iii) Synthetic pyrethroids, carbamates
Army Worm I) Grain Crops, grasses, corn ii) Damage to leaves ii) Grass control before planting
Cotton ball worm I) Cotton, beans, maize ii) Hollowing of internal tissues of the plant iii) Lesser crop density while planting
Cassava mealybugs: I) Cassava and Manihot glaziovii ii) Stunting, leaf distortion iii) Introducing natural enemies like Phenacoccus manihoti
Similar questions