ZOO506 Final Term Solved Papers

zoo506 past papers solved

final term

Q1. What damage caused by termites?

They enter through cut ends of setts & feed on the soft tissue. The tunnel is filled with the soil. The termites attack setts, shoots, canes and also stubbles Entire shoot dries up and can be pulled out easily

Q2. What should be kept in mind while field scouting?

a field scouting must know: ➢ How to properly identify pests and their damage ➢ How to get an accurate assessment of pest populations ➢ A field scouts’ objective is to provide an accurate and unbiased objective of pest populations ➢ What tools and procedures do you use for alfalfa weevil for potato leafhopper, etc. ➢ Both of these examples are pests on alfalfa; however, the sampling procedure is different.

Q3. What are cerci?

A pair of antennae like structure (sometimes short sometime long) present at the end of abdomen are known as cerci

Q4. What is meant by economic threshold?

Economic threshold. The pest density at which management action should be taken to prevent an increasing pest population from reaching the economic injury.

Q5. How many types of injurious species are present?

Those insects which attack injurious species probably form the most important group They are divided into two sections: 1-The parasites that live in or on the different stages of other insects, then called hosts 2-The predators that capture and devour other insects

Q6. Symptoms of red cotton bug?

Dusky cotton bug: Oxycarenus hyalinipennis

➢ Sucks the sap from developing seeds in open bolls and stains the lint black. ➢ Seeds discolored and shrunken

Q7. What are attractants?

Attractants Sometimes called attrahents are materials used to lure insects to traps and poisoned baits. The use of geraniol in Japanese beetle traps, sugar sirups for ant baits, and fermenting sirup solutions for trapping various moths are good examples.

Q8. What is difference between intelligent cultivation and destruction of vegetable?

1Intelligent cultivation and use of fertilizers are well as pruning to remove injured or diseased parts will aid in insect control 2The destruction of vegetable trash and weeds, frequently called clean culture, is also an important factor, especially in the control of hibernating insects

Q9. What is meant by hopper burn?

A heavy infestation produces symptoms of “hopper burn” i.e., leaves become dry and brown after insect feeding and patches of burned plants are often lodged.

10.

Insect borne diseases (5)

Insect Vector born Diseases in Human

• insects that are highly injurious is that of human and animal health and comfort. Some insects, notably mosquitoes and flies, annoy man and other animals by their bites and stings.
• Other insects such as lice have become adapted to more or less continuous life upon animals and cause much discomfort and loss of vitality
• Not only do insects live externally on animals but also internally in the skin tissues, and in a few cases within the flesh and in the alimentary tract
• Besides the mental and bodily loss due to their presence, insects transmit disease organisms from one person or animal to another Just as in the transmission of plant diseases the insect may be an accidental agent or an essential carrier

A few of the more important insect-borne disease in organisms are

• Malaria
• Bubonic plague
• Typhoid
• Typhus
• Yellow fevers.

11.

The extremes of both temperature and humidity, either high or low, are not only effective barriers in the natural control of insects But they are also useful in artificial control Light and electricity are other factors that come under this heading Physical Factor Controlling Insects 1Heat

2-Cold

3-Moisture

4-Light

1- Heat

Most insects cease reproduction and soon die at temperatures rom 100 to 1l0°F