Control Mechanism Of Pests Flashcards
(49 cards)
Under good conditions the duration of the development cycle from egg to adult is ___________ days for beetles and ___________ days for moths
18-25 , 28-35
Major factors affecting population growth of most insect species are
Temperature
Relative humidity
And Moisture content
High moisture content, More than ________ percent renders food grains soft and susceptible to attack
16
Species breeds rapidly even in driest conditions are…
Trogoderma granarium
Tribolium spp
The optimum conditions of temperature and relative humidity (RH) for the rapid growth and multiplication of stored grain insect pets range from ________ and __________respectively
25-35 degree Celsius
60-65 %
When the insect population reaches a certain density, their metabolic activities release more heat than can be dissipated, In localised areas where the insect population is extremely dense the temperature may reach _______ degree Celsius Associated micro-organisms, mainly _______ may raise this to nearly _______degree Celsius causing extensive spoilage and occasionally , ____________
45
Fungi
75
Spontaneous combustion.
Temperature below ______ degree and above ______ degree retards growth and development , Heating of grains to ________ degree Celsius for __________ min kills almost all pests
15
42
50-60
10-20
Oxygen level <__________% is lethal to all insect pests
1
Use of low O2 _______ % and high CO2 ________ % is lethal to all insects
2-4
9-9.5
Bio agents are
Bt
Parasitoids
Predators
Grain protectants are
Pyrethrum dust or 5% malathion at 250g/100kg of seed
Fumigants are
Aluminium phosphide
Ethylene Bromide
Ethylene dichloride/carbon tetrachloride mixture
Prophylactic treatment at storage depots in FCI , Chemicals are
Malathion 50% EC
Deltamethrin 2.5 % WP
Generally ______ % of the stocks to be treated during the month are treated with Deltamethrin 2.5 % WP and remaining ______% stock is treated with Malathion 50% EC
80 , 20
______ is used to control surface infestation, crawling infestation and cross infestation of stored grain pests by air charging which acts as contact pesticide as well as fumigant when the space is airtight after spray
DDVP
In case DDVP is not available, air charging can be done with ________
Malathion 50% EC
Dilution of Malathion is
1:100
Dilution ratio of Deltamethrin 2.5% WP is
40gm/L
Dilution Ratio of DDVP is
1:150
Doses with diluted solution of Malathion 50% EC, Deltamethrin 2.5% WP and DDVP 76% EC is
3 L per 100 m2
3 L per 100 m2
3 L per 100 m2
Periodicity of Malathion 50 % EC is
15 days
(21 days in winter)
Periodicity of Deltamethrin 2.5 WP is
90 days
(3 months)
Periodicity of DDVP 76% EC is
As and When required
(Use banned w.e.f
31-12-2020)
Floor area of stack for rail fed godown and Raod fed godown is
9.15 m * 6.1 m =56 m2
9.15 m * 6.1 m =56 m2
