How do you control maize weevils?
Control
- The only way to control these pests is fumigation.
- Since it is an internal pest, residual control will only kill.
- Exposed adults. To kill the internal stages (larval and pupal), you must fumigate. Heating grain to 60C can kill larvae; however, this may decrease germination and baking quality of flour.
How do you control cowpea weevils?
Leaf powders of Tephrosia vogelii , tobacco snuff and combination of neem and Tephrosia are effective in controlling stored grain of cowpeas. Black pepper powder can as well be used for cowpea grain storage particularly where the aforementioned botanicals are not available.
What do cowpea weevil larvae feed on?
This species also is known as the southern cowpea weevil. The larvae of this species feed and develop exclusively on the seed of legumes (Fabaceae) hence the name bean beetle. The adults do not require food or water and spend their limited lifespan (one – two weeks) mating and laying eggs on beans.
What is the common name of Vigna unguiculata?
cowpeas
Vigna unguiculata is a member of the Vigna (peas and beans) genus. Unguiculata is Latin for “with a small claw”, which reflects the small stalks on the flower petals. Common names for cultivated cowpeas include; black-eye pea, southern pea, niebe (alternatively ñebbe), and crowder pea.
What insecticide kills maize weevil?
Pirimiphos-methyl + Permethrin (Antuka EC, Betallic Super, Super Guard) Apply powder at 50g to 90Kg of maize (1 maxi bag ). Apply liquid at 300ml per 2L for 1000kg (10 maxi bags) of maize and mix well using a shovel Pirimiphos-methyl – organophosphate, WHO class II (Moderately hazardous) contact insecticide.
What insecticide is good for weevils?
To kill weevils for real, treat them with Ortho® Insect, Mite & Disease 3-in-1 or Ortho® BugClear™ Insect Killer for Lawns & Landscapes. Be sure to always follow the label directions. Grain weevils are harmless to people, so they’re more of a nuisance than a threat.
What is the botanical name of cowpea weevil?
Callosobruchus maculatusCallosobruchus maculatus / Scientific name
Can cowpea be attacked by weevils?
The plant products used for this study produce odors that are believed to repel weevils, thereby preventing them from attacking cowpea seeds. There is limited information on the use of the plant products as an alternative control method for controlling weevils in storage.
What do cowpea weevil eat?
Other bruchids that feed on stored products include: the pea weevil, Bruchus pisorum (Linnaeus), which feeds primarily on green peas; the broadbean weevil, B. rufimanus Boheman, which prefers kidney beans and lima beans; and the common bean weevil, Acantoscelides obtectus (Say).
What is the seed rate of cowpea?
| 1. | Season | June – July – Irrigated September – October – Rainfed January- February – Summer |
|---|---|---|
| 6. | Seed rate | 25 kg/ha |
| 7. | Spacing | |
| (i). | For fodder purpose | 30 x 15 cm in lines |
| (ii). | For seed purpose | 60 x 15 cm in lines |
How cowpea is cultivated?
It can grow successfully in acidic soil but not in saline/alkaline soil. In hard soil, one deep ploughing followed by two or three harrowing and planking are sufficient. In normal soil only two harrowing & planking is enough. For summer season crop give a irrigation immediately after harvesting of Rabi crop.
What is the life cycle of weevils?
The life cycle of the black vine weevil consists of an egg, 6 or 7 larval instars, a pupal instar and the adult beetle. In temperate climates in the Northern hemisphere, the first adult weevils appear around May. They are approximately 7 – 10 mm long, brownish black and have dull yellow spots on their back.
How can bean weevil be controlled?
How to Prevent Bean Weevil Infestations
- Seal or caulk any cracks and holes in your pantry and in your home in general.
- Store dried food products in air-tight metal, glass or hard plastic containers.
- Check bean packaging for compromised surfaces, such as tears and holes.
How do you protect grains from weevils?
Freeze and kill it: It is advised to keep packets of spices and flour in the freezer for four days as soon as you have bought it. You can do this to flour, oats, cookies, corn meal, and spices. This will kill all the larvae and eggs (if) present inside the packet and will stop further infestation.
What are the growth stages of cowpea?
Cowpea can be harvested at three different stages of maturity: green snaps, green-mature, and dry. Depending on temperature, fresh-market (green-mature) peas are ready for harvest 16 to 17 days after bloom (60 to 90 days after planting).
Where is Callosobruchus maculatus from?
Callosobruchus maculatus is a cosmopolitan pest. Biogeographically, the species originated in Africa. It later spread to tropical and sub-tropical parts of the world (Beck and Blumer 2014).
Which fertilizer is best for cowpea?
Apply FYM/compost – 5 – 10 t/ha as basal with last ploughing. 15 – 20 kg N/ ha as starter dose in poor soils (organic carbon<0.5%), 50 – 60 kg/ha P2O5 and 50 – 60 kg. K2O/ha . Phosphorus and potassic fertilizer should be give according to soil test value.
What is the maturity period of cowpea?
Cowpea can be harvested at three different stages of maturity: green snaps, green-mature, and dry. Depending on temperature, fresh-market (green-mature) peas are ready for harvest 16 to 17 days after bloom (60 to 90 days after planting). Harvest date for green snap pods is normally specified by the processor.
How do weevil reproduce?
Many species of weevils lay their eggs on the ground near a host plant, but for some species, the females will bore a hole directly into the plant stem or seed. She then lays her eggs in the hole, and cements it shut. Generally, a female can lay up to 250 eggs at one time, and the eggs take up to three days to hatch.
What do maize weevils feed on?
The adults and larvae feed internally on stored maize grains or in the field. The adult maize weevils are 3 -3.5mm long, dark brown or black in color and shiny and pitted with numerous punctures.
How many antennae does a maize weevil have?
The maize weevil has a snout/beak and elbowed antennae. The antennae have eight segments and are often carried in an extended position when the insect is walking.
How to control the pests of maize?
Addition of inert dust such as ash and clay can help reduce insect number through desiccation Biological control measures: These include some parasitoids, fungus and bacterium. The maize should be harvested as soon as its mature, dry the grain and re-dry during storage . The moisture levels should be about 12%.
What are the biological control measures of maize?
Biological control measures: These include some parasitoids, fungus and bacterium. The maize should be harvested as soon as its mature, dry the grain and re-dry during storage . The moisture levels should be about 12%. Collect and dispose spilled grain in or around the storage area.