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Sitophilus oryzae || Stored grain pest


How to Get Rid of Rice Weevils (4 Easy Steps)

Click here for our rice weevil guide and shop the professional-grade products featured in this video!

In this video, we’ll show you how to identify and get rid of rice weevils on your property.

Shop for Pyrid Aerosol here!

Shop for a Novacide Aerosol here!


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Introduction: 0:00
How to Identify Rice Weevils: 0:33
How to Inspect for Rice Weevils: 1:33
How to Treat for Rice Weevils: 2:24
How to Prevent Rice Weevils: 4:56


Rice weevils are smaller than even grains of rice, growing only to be as large as 3 to 4.6 millimeters in length. They have dark brown bodies, and you may even notice some lighter brown patches if you can see them up close enough. You can tell a weevil apart from other pests like a grain beetle because you’ll notice the weevil’s long snout. It’s hard to miss, even when they’re that small.

To confirm rice weevil activity, look in or around your pantry or where foodstuff is stored. You may see a few rice weevils wandering the shelves, but focus on finding the source of your infestation. Look inside bags or boxes of grains and other stored foods. Remember, since rice weevils spend their developmental stages within grains, you’ll only see adults during your inspection. Be sure to also check any cupboards, drawers, and shelving.

After identifying your pest and inspecting for activity on your property, it’s time to start treatment.
Before starting any treatment, be sure to wear your personal protective equipment, or PPE, and remember to keep all people and pets off the treated areas until dry.

Before starting your treatment, you need to clear out your pantry. Start by throwing out boxed and bagged foodstuffs. Next, vacuum all cracks and crevices in the pantry shelving or cabinets. If your shelving is adjustable, clean out the peg holes with a toothpick and vacuum. Rice weevils may be found in these tight spaces as they travel from place to place. Be sure to throw out the vacuum’s bag or clean the canister when you’re done. Then wipe down the pantry shelves with water to clean up any food residue. Do not use any strong cleaners or bleach, as these will keep pests away from the pesticides you’ll soon apply.

Once you’ve cleared and cleaned your pantry, you’ll need to use insecticide aerosols labeled for rice weevils like Pyrid and Novacide. Pyrid is an insecticide aerosol that’s often used as a flushing agent, and it’s great to treat tight cracks and crevices where rice weevils or other pests may be hiding. To use Pyrid as a crack and crevice treatment, just remove the white applicator, attach the provided red applicator, and make sure the straw is firmly affixed in the spout. Shake the can, and spray along the lengths of any cracks and crevices in your pantry where rice weevils could be hiding. Next, apply Novacide. Novacide is another insecticide aerosol, but this one contains an insect growth regulator, or IGR. Just shake the can, hold it upside-down, and spray 1-2 inches or product every couple of inches.

Visit our website to learn more about rice weevils and shop for pro-grade products!

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Sitophilus oryzae || Stored grain pest

The rice weevil (Sitophilus oryzae) is a stored product pest which attacks seeds of several crops, including wheat, rice, and maize. The adults are usually between 3 and 4.6 mm long, with a long snout. The body color appears to be brown/black, but on close examination, four orange/red spots are arranged in a cross on the wing covers.

An Introduction to the Rice weevil (Sitophilus oryzae)

Rice weevil videos are few and far between, here's my introduction to the major stored grain pest.

Uploaded for my #MScSISS assignment. Map of India from

Rice Weevil/ Sitophilus oryzae/ Storage pest/


Rice weevil (Sitophilus oryzae)

The rice weevil (Sitophilus oryzae) is universally regarded as one of the most destructive primary pests of stored cereals. It can completely destroy stored grain. It is found occasionally in Canadian grain.

Agriculture and Agri-Food Canada

Rice Weevil Life Cycle (Sitophilus oryzae)

An Interesting and Rare Video of Rice Weevil life cycle. This is my small introduction of Rice Weevil. By Amrutha K


Rice Weevil

This video provides information about marks of identification, lifecycle, nature of damage and control measure of a serious stored grain pest Sitophilus oryzae which is commonly known as rice weevil

Insect Damage to Stored Grains

Time lapse video of insects feeding on stored grains. Stored product insects do immeasurable damage to mankind's stored grain supplies every year. Here you can see rice weevils, Sitophilus oryzae feeding on corn and lesser grain borers, Rhyzopertha dominica feeding on wheat over a 3 month period in a side by side comparison. During this time, the clean and sound grain kernels are turned to dust and empty husks.

Diagnosing Sitophilus

Dr Mark Stanaway shows how to distinguish Sitophilus oryzae, Sitophilus zeamais and Sitophilus granarius, which are damaging stored grain pests in Australia. The fact that these species are similar in appearance is a barrier to their effective management, with S. oryzaes exhibiting currently weak resistance to phosphine treatments. Being able to distinguish species of Sitophilus will help determine which control option is required when the beetles are found infesting grain storage facilities. A hand held digital microscope is used to observe the main taxonomic characters of the species.

Where & Why Dangerous Rice Weevils Sitophilus oryzae Are Running So Quickly? (ENGLISH)

Where & Why Dangerous Rice Weevils Sitophilus oryzae Running So Quickly? (ENGLISH) = VIDEO LINK: = Dangerous Rice Weevils Sitophilus oryzae in Ukraine (ENGLISH Story) = = The Story of Entomologist # 22. Rice weevil Sitophilus oryzae (Coleoptera, Curculionidae) in Ukraine. = Biologist, entomologist, candidate of biological sciences Victor Fursov tells about a dangerous pest of grain stocks - the rice weevil Sitophilus oryzae, whose adult individuals and larvae damage and feed on various stock seeds - seeds of rice, corn, wheat, barley, rye, peanuts, beans, beans , sorghum, cassava, and even processed cereals and dry pasta.
Rice weevil - Sitophilus oryzae.
Maize weevil - Sitophilus zeamais.
Common, wheat weevil - Sitophilus granarius.

= Рассказ Энтомолога. Рисовый Долгоносик Sitophilus oryzae (Coleoptera, Curculionidae) в Украине. = Биолог, энтомолог, кандидат биологических наук Виктор Фурсов рассказывает про опасного вредителя запасов зерна - рисового долгоносика Sitophilus oryzae, взрослые особи которого и его личинки повреждают и питаются различными запасами - это рис, кукуруза, пшеница, ячмень, рожь, арахис, бобы, фасоль, сорго, кассава, и даже вермишель.
Рисовый долгоносик - Sitophilus oryzae.
Кукурузный долгоносик - Sitophilus zeamais.
Обыкновенный амбарный долгоносик - Sitophilus granarius.

#Sitophilusoryzae, #riceweevil, #Curculionidae, #ricepests, #Sitophilus, #Sitophilus zeamais, #рисовыйдолгоносик, #долгоносики,


Uploaded: 19.VI, Kiev, Kyiv, the capital of UKRAINE.
Загружено on-line: 19.VI.2018, Киев, столица Украины

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проект WEEVIL 19 06 2018 Kiev Coleoptera Sitophilus oryzae Rice Weevils 703 ENGL
проект WEEVIL 19 06 2018 Kiev Coleoptera Sitophilus oryzae Rice Weevils 703 ENGL
проект WEEVIL 19 06 2018 Kiev Coleoptera Sitophilus oryzae Rice Weevils 703 ENGL



Investigating the Effects of Host Grains on the RiceWeevil, Sitophilus oryzae (L.)

Investigating the Effects of Host Grains on the Rice Weevil, Sitophilus oryzae (L.)

The present study was conducted to observe the effect of host preference on ovipsition, adult emergence, adult body length, longevity and sex ratio of Sitophilus oryzae, the most cosmopolitan pest which causes severe losses in rice, maize, barley, wheat. Investigation was carried out on development of S. oryzae on four main cereal crops maize, rice, chick pea, and millet, under laboratory conditions. The mean developmental period from egg to adult varied, being lowest on maize (32.5 days) and highest on millet (43 days). The body length of the male and female were also differing in the test grains. Overall the females’ body lengths were found to be longer than males in all the test grains. The fecundity and longevity were also altered with the different grains. The highest fecundity and longevity were found in maize with 453 adults in the lifespan of 184 days. With respect to fecundity the female: male ratio was not found to be significantly differed in maize, rice and millet (maize- 2.36:1, rice- 2.35:1 and millet- 2.21:1) while in chick pea a significant decrease i.e. 1.98:1 were observed. From the present study it was found that there was a linear relationship and a significant correlation between grain loss and the number of adult emergence. All the stages of the life cycle, starting form egg laying to the emergence were found to be highest in the maize. The study also suggests that maize was rich in carbohydrate that has increased the size, fecundity and longevity of the insects. Hence, maize is the best suitable grain for rearing of S. oryzae insects.

#Sitophilusoryzae #rearing #hostpreference #fecundity #longevity

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How to Get Rid of Bean Weevils & Avoid Infestation by Acantoscelides obtectus?

VIDEO LINK: = How to Get Rid of Bean Weevils & Avoid Infestation by Acantoscelides obtectus? Entomogist Dr Victor Furslogist tells the story about life cycle and infestation of beans by bean weevil Acantoscelides obtectus (Coleoptera, Bruchidae).
Acanthoscelides obtectus, the bean weevil, is a species of beetle. The species was described in 1831 by Thomas Say.
Bean weevils feed on vetches, beans and other leguminous plants. They are generally considered a pest species for this reason.
Originating in Central America they have been inadvertently spread around the world in grain shipments.
Bean weevils are small beetles, ranging in size from 2 to 5 mm.
Bean weevils develop and feed upon leguminous plants. Adult bean weevils hibernate inside the seeds or seed pods of these plants.
Adults emerge from hibernation in April to mate. Female bean weevils lay eggs onto seed pods, or into them by chewing holes, in groups of 2 to 20 eggs. A single female can lay up to 200 eggs but 40 is average fecundity.
Egg development can take 30 to 45 days before a 1st instar larvae merges. After approximately 3 days the larvae then moults and becomes a second instar larvae which then begin to consume the seed, with the larval stage lasting 3 to ​3 1⁄2 weeks in total.
The larvae then pupates inside the seed, taking 9 to 29 days. The life cycle of a single generation takes from 100 to 110 days.
The bean weevil is a significant pest in some parts of the world, especially in areas such as Australia where it is non-native.
It damages crops both in situ and when stored in warehouses, and can potentially reduce crop yields by 60% as the larvae develop at the expense of the seeds.

#beanweevils, #Acanthoscelides, #Bruchidae, #Bruchinae, #Curculionidae, #Coleoptera, #beetles,
#storagepests, #invasivepests, #PhaseolusPests, #agriculturepests,

Uploaded: 05.03.2019, Kiev, Kyiv, the capital of UKRAINE.
Загружено: 05.03.2019, Киев, столица Украины

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проект3 ЖУК 04 03 2019 Acantoscelides Beetle Фасолевая Зерновка 408 8m ENGLISH
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проект3 ЖУК 04 03 2019 Acantoscelides Beetle Фасолевая Зерновка 408 8m ENGLISH



Stored Grain Pest (Hindi/English) Agricultural Field Officer

Stored Grain Pest

Two Pest Categories
Primary – Cause initial injury
Secondary – Take advantage of injury.

Types of losses due to pests

Direct losses
Actual consumption
loss of weight,
loss of nutrients,
lower germination,
reduced grade
lower market value
Damage to structures or containers

Indirect losses
wet grain heating
parasites of humans
control and application costs
excessive pesticide residues
loss of consumer confidence

Common Facilities with Stored Product Pests
Bins will be covered in the lab

Pest of stored grains
Pathogens (fungi)

Ideal Conditions for pest
Environment Conditions
Temperature 20 - 40oC
Relative humidity 60-70%
Mixing grain lots
old and new
Longer storage - no insects

Common Post harvest insects
Lesser grain borer (Rhzopertha dominica),
Rice weevil (Sitophilus oryzae),
Angoumois grain moth (Sitotroga cerealella),
Red flour beetle (Tribolium castaneum)
Beetles 15-18 days
Moths 28 - 35 days

IPM: Management Tactics
Non-chemical control
Many of the non-chemical control methods are PREVENTATIVE
Biological Control: ?
Judicious use of insecticides
Examples of treatment plans, associated application equipment, formulations available and some products

General Principles for an IPM Program
Inspect incoming material (prevention) is the first line of defense against most stored product insects.

Inspection of incoming materials
Look for trails in dust to determine presence of insects
Boxes of grain products—
check surface of transportation vehicle and dust residues,
remove inner pack,
check box and bottom of box,
check pallets

Inspect material before putting inside kitchen pantry
Check cereal boxes, flour bags, or any grain containing food

General Principles for an IPM Program
Inspect incoming material
First in, first out

Spilled food
Flour dust
Trash containers
Broken packaging
Equipment cleaning

It’s one thing to clean out a kitchen pantry
Discard infested items
Wipe shelves down with warm soapy water

Non-chemical controls
Mechanical destruction

Low temperature of product can retard or kill stored product pests
Grain storage silos usually have aeration equipment to pull cold air into grain in winter to kill or slow development of grain pests
Storing susceptible materials in refrigerator will slow or kill pests
Packages placed in refrigerator will kill most stored products pests if the cold penetrates to all areas of the package (4 days for a 5 lb bag of flour)

Processing plants are often heated to 120-150oF for 24 hours
Infested food can be placed in oven at 150oF for 20 minutes
Infrared and microwaves are often used to kill pests in processing

Packaging can keep products free of insects
Newly hatched larvae can penetrate cracks 0.12 mm wide
Waxed paper and cardboard can be penetrated by stored products pests
75% of infestation occurs at folds and corners of a carton
Foil laminates can prevent most insect infestation
Glass jars and metal drums are virtually insect proof

Mechanical destruction
High rpm (2,900 rpm) will kill insects and mites

Milling and other processing equipment can mechanically destroy insect pests

Chemical control
Much changed with loss of MeBr
Contact treatments -- Ultralow volume (ULV) or Ultralow dosage (ULD) applications of pyrethrins or pyrethroids
Fogs, mists, and aerosols cannot penetrate food to kill insects
They kill exposed stages and can be used regularly to prevent infestations in the facility from attacking products
Protectant insecticides
Placed in cracks and crevices where insects rest.

Inorganic dusts (diatomaceous earth) sometimes used to protect seeds and grains from insects
has been registered for application to all major grains and has been used since 1958.
EPA tolerance is 8 ppm
in recent years most of the common pest species have developed resistance to malathion
Not widely used

Chlorpyrifos-methyl (Reldan),
Banned in 2003
Pirimiphos-methyl -- expanded registrations for stored grain insects
Not widely used
Registered for stored grain use in Jan. 2005.
Effective against all major insect pests.
Like Bt, it is a bacterial by-product so is considered “natural” and can thus be used on grain for any target market (including organic).

Hydroprene (Gentrol)-- can be fogged and sprayed for control of stored products pests
Gentrol Point Source

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Insect Pests of Stored Grains ????

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Stored Grain Insect pest Scientific Names .... Family .... And orders

S.Y.B.Sc. | Applied Zoology - I | ZO-232 | Chapter 2 | Rice Weevil

Dr. Jyoti Gangurde | S.Y.B.Sc. | Applied Zoology - I | ZO-232 |
Chapter 2 : Agricultural Pest & their control
Rice Weevil ( Sitophilus oryzae), Systematic position,Distribution, Host plants,Identification marks, Life cycle, Nature of damage, Control measures

Sitophilus oryzae


Insect -Pests of Storage Grains ????

storage pest is an insect or other animal that damages or destroys stored food or other stored valuable organic matter.[1] Insects are a large proportion of storage pests with each type of crop having specific insects that gravitate towards them such as the genus Tribolium that consists of insects such as Tribolium castaneum (red flour beetle) or Tribolium confusum (confused flour beetle) which damage flour crops primarily.

Crops can be completely destroyed or even partially damaged affecting the quality of the crop and the ability to germinate new ones, by decreasing the protein content and removing the seeds from the grains.There are two types of grain insect pests, primary and secondary pests.

Primary Pests

Primary grain pests attack the whole grain. The eggs are laid outside the grain, before the larvae mature inside the grain and then chew their way out.

Some of these pets include the Lesser grain borer, Granary weevil and Rice weevil.

Lesser grain borer (Rhyzopertha dominica)

The lesser grain borer has a dark coloured cylindrical structure with the head concealed.[4] When lesser grain borer eggs are laid, they are laid outside the grain, however mature inside the shell of the seed which can take up to 6 weeks if the temperature is cooler, with the adult borers not living for longer than two months.
This species is known to damage stored wheat, corn and cereal crops with the seeds become hollowed out husks. Products with small infestations should be discarded however the grains can be treated with smaller amounts of spray.
However, large infestations require more control, including complete fumigation.

Rice weevil (Sitophilus oryzae)

The adult rice weevil has an orange-black exoskeleton and lays up to 450 eggs in pores of the damaged grains with each hatched egg further damaging the grain from the inside.
Similarly to the lesser grain borer, maturation also happens inside the grain with the matured adult rice weevil eating through the husk of the grain to get out. The life cycle is similar to that of the lesser grain borer in summer months (approximately one month) and adult weevils live up to 8 months after the experience their life cycle.

Secondary Pests
Secondary grain insects feed on broken grain and any powder products left as a result of the broken grain. These pests include the genus Tribolium, beetle species and moth species.

Rust-red flour beetle (Tribolium castaneum)

The Rust-red flour beetle is a red-brown beetle with an exoskeleton that darkens in colour as the beetle increases in age, with the maximum adult age being a year. Unlike primary pests,
Rust-red flour beetles can produce up to 1000 eggs and lay them inside the damaged grain with parts of the larvae able to use the damaged grains and cereal as their food source.



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