The optimum temperature for growth of stored-grain molds is around 25–30 °C, but some grow well at 35–37 °C or above, such as Aspergillus spp. (Figure 3).
How does temperature affect grain storage?
The best temperature for storage is between 40 – 60 degrees. Higher temperature will affect the ability of the stored seeds to germinate over time, but food value is only slightly reduced. Freezing temperatures will not damage stored grains or pulses.
Which pests affect stored grains in tropical and subtropical regions?
Among these the almond moth is the most serious pest especially in rice and sorghum grain in tropical and subtropical climates.
Which one of the following is stored grain pest?
Weevils. Of the internal feeders, weevils (Figure 1, Figure 2, and Figure 3) are generally given the most attention because they are among the most destructive pests of stored grain.
How does moisture affect the storage of grain?
The most important physical factor in grain storage is moisture content because it affects the growth of mould, with which all stored grain is infected. It is generally accepted that climatic condition leads to physical changes in stored bulk grain through the movement of moisture which leads to deterioration.
How temperature and moisture affect the storage of food grains?
The most influential factors in the storage of grains is moisture and temperature. … The best temperature for storage of food grains is between 40 – 60 degrees. Higher temperature will affect the ability of the stored seeds to germinate over time, but food value is only slightly reduced.
How do you control stored grain pests?
In summary, there are viable alternatives to insecticides for managing pests of organic stored grains. These include sanitation, monitoring, controlling temperature, carbon dioxide fumigation, and diatomaceous earth, and biological control.
Which are the different stored grain pests 4 marks?
Primary and secondary storage insects
- Rice weevil: Sitophilus oryzae, S. …
- Khapra beetle: Trogoderma granarium.
- Lesser grain borer/Hooded grain borer/paddy borer beetle: Rhyzopertha dominica.
- Angoumois grain moth or Grain moth: Sitotroga cerealella.
- Pulse beetle: Callosobruchus chinensis, C.
How can I protect my grains from insects at home?
Turmeric powder is another good alternative method to prevent the grains from insects and pests. Grains and seeds are mixed with turmeric powder before storing them in containers or jute bags. This treatment provides protection for up to 6-8 months and is equally safe for consumption.
What are the common storage pest?
Primary insects
- Rice Weevil. (Sitophilos oryzae (Linnaeus)) Click for more info. A female lays up to 150 eggs. …
- Angoumois Grain Moth. (Sitatroga cerealella (Olivier)) Click for more info. The white larvae bore into the kernels and eat the inside. …
- Lesser Grain Borer. (Rhyzopertha dominica (Fabricus) Click for more info.
Which is the cheapest method to control stored food grain pest?
In order to kill these insects at various stages of growth, Sun drying is the most common and preferred method. Proper drying not only kills the insects, germs and fungi, but also reduces grain moisture to the limits of safe storage.
What are primary and secondary pests?
Grain insect pests may be divided into primary and secondary pests. Primary grain insects have the ability to attack whole, unbroken grains, while secondary pests attack only damaged grain, dust and milled products.