Why sampling is important for the quantitative survey of insects?
In quantitative survey a count of insects is required. Due to large number and/or secretive nature it is not possible or even desirable to count each and every individual in a population. Hence more efficient method is by sampling. The total number of samples to be taken depends upon the degree of precision required.
What are some insect sampling techniques?
There are two major collecting approaches to sampling insects: active collecting, such as sweep netting, foliage beating, searching the ground, under rocks, sifting leaf litter, peeling tree bark; and passive collecting, where traps are set to either attract or intercept insects including pitfall traps or baited …
What is role of survey and surveillance in forecast the insect pest and diseases?
Pest monitoring through field surveys and surveillance helps in forecasting the population build up of pest. It reduces the load of pesticides application and forms the basis of Integrated Pest Management in sericulture. Each silk host plant is attacked in the field by number of insect pest species.
What are the methods of pest monitoring?
Methods of control include using airtight containers for storage, periodic laundering of garments, trapping, freezing, heating and the use of chemicals; mothballs contain volatile insect repellents such as 1,4-Dichlorobenzene which deter adults, but to kill the larvae, permethrin, pyrethroids or other insecticides may …
What are the objectives of pest monitoring?
Sampling and Monitoring for Pests and Their Natural Enemies The objectives of sampling or monitoring are to detect the presence or absence of pests; quantify abundance of pests and their natural enemies; and follow the progress of an arthropod population through time by regular, periodic sampling.
What sampling technique is most advisable to be used in collecting nocturnal insects?
While pitfall traps are by far the most commonly used method of sampling epigeic arthropods, other methods are available as well, some of which can provide estimates of arthropod density.
What are the methods of insect collection?
- Light Trapping. Four light trapping devices used to collect insects, see text for details.
- Flight Intercept Trap. Homemade ground collection FIT.
- Malaise, FIT Combination.
- Pitfall Trap: Diagram of a double cup pitfall trap.
- Bait Traps.
- Beat Sheet.
What are the materials needed in insect collection?
Collecting equipment and methods
- Sources for collection equipment.
- Hand picking, tweezers, aspirators, fine brushes and cotton swabs.
- Jars and bags (zip-lock sandwich bags, cockroach trap, food-baited jars, cricket cages, sorting trays)
- Nets (aerial nets, sweep nets, aquatic nets)
What do you mean by pest surveillance?
Refers to the constant watch on the population dynamics of pests, its incidence and damage on each crop at fixed intervals to forewarn the farmers to take up timely crop protection measures.
What are the components of pest surveillance?
Basic components of pest surveillance • Identification of insect pest (collected, reared otherwise barcoding IBOL: International Barcode of Life). Determination of pest population (useful in pinpointing factors that bring changes in natural population and understand functioning of life-system of pest species).
How are sampling methods used in Pest Management?
It reduces the load of pesticides application and forms the basis of Integrated Pest Management in sericulture. Common sampling techniques for quantifying pest populations and damage caused by them are reviewed emphasizing the need for quick and simple sampling methods.
How are sampling units used to count insects?
Sampling unit is a portion of the habitat from which insect counts are to be made e.g. a plant, branch, leaves or fruiting bodies, a clump, a micro plot of 1 m2, etc. Sampling unit must be distinct and should not overlap. Sample: A group of sampling units from which an estimate is made.
How to estimate the number of insect pests?
Pest forecasting with reasonable precision. Quantitative: To estimate the exact number of one or more species of insects in time and space. In quantitative survey a count of insects is required. Due to large number and/or secretive nature it is not possible or even desirable to count each and every individual in a population.
Which is useful for the detection of pests?
Qualitative survey – Useful for detection of pest Quantitative survey – Useful for enumeration of pest. Sampling Techniques Absolute sampling – To count all the pests occurring in a plot Relative sampling – To measure pest in terms of some values which can be compared over time and space e.g.