3 beneficial insects

Insects Diseases Rice 10% 15% Wheat 5% 15% Jowar 12% 18% Bajra 5% 8% Cowpea 3% 15% green gram 2% 14% Black gram 2% 11% Soyabean 3% 9% Pesticides, in general, make a class of chemicals used to control pests, which in..

Name of the Crop Name of Insect-Pest Nature of Damage Control Measure Rice Gundhy bug Attack during post flowering period Spray monocrotophos Leaf hopper Attack on Leaves Spray monocrotophos Wheat Gujhia weevil Grubs feed on the roots and adults cut the ..

Polymorphism is the phenomenon of occurrence of more than two forms of an individual within the same kind of organism. A colony is formed of more than two types of individuals, which differ in their structure, function and behaviour. Colonialism is found in insects and coelenterates. Pol..

They are said to be partly autotrophic and partly heterotrophic. These autotrophs supplement their nutritional requirements by trapping and digesting insects and other small animals. The trapped insects are killed and their proteins are digested by proteolytic enzymes secreted ..

Commercial manufacture and use of synthetic insecticides in the last six decades has led to many problems such as Air pollution during manufacturing stages. Bhopal gas disaster is a worst example for air pollution. Accidental ingestion of insecticides during handling and application leading t..

Interaction Effect on species A Effect on species B Nature of Interaction A. Positive Scavenging (+) (Nil) Beneficial to scavenger, who feeds on flesh or dead organisms Commensalism (+) (Nil) One is beneficial, other is unaffect..

1) They produce food for all organisms 2) They provide beneficial substances like drugs, tannins, fibres, rubber, vegetable oils, fuel, condiments. 3) Some plants contain alkaloids which check growth of cancer cells. Example: Rosy periwinkle. 4) Plants release O 2 , cool enviro..

These are bacteria which live in a mutually beneficial association with other organisms. Such bacteria derive the essential nutrients from their host organisms and in that process help the host through some of their biological activities. 1. The most familiar example of symbiotic bacteria..

Interspecific Interactions - Interaction between different populations occur for their needs like, 1) Nature and mode of food gathering 2) Space to rest or shelter 3) For specific habits like aggregation, breeding etc. These interactions are of three types. They are a) Positive or be..

Question: Spiders and scorpions are 1. insects 2. millipedes 3. arachnids 4. crustaceans Answer: 3..