Insect Pests of storage Dr Baoua Ibrahim INRAN-NIGER PICS - - PowerPoint PPT Presentation
Insect Pests of storage Dr Baoua Ibrahim INRAN-NIGER PICS COORDINATOR Kaboul, AAEP project training May 26-27 Hands-on Exercice Four group Each group will have one bag Open the bag Each members of the group take a sample of the
– Number of living insect per species – Take a sample of 100 grains:
– Take a sample of 10 wet grain, open and record any insect larvae or adult
Common name Pest Host Rice weevil Sitophilus oryzae, S. zeamais, S. granarius Rice, wheat, sorghum, barley, maize Khapra beetle, Trogoderma granarium Cereals, groundnut and pulses Lesser grain borer Rhyzopertha dominica Paddy, maize and wheat Angoumois grain moth Sitotroga cerealella Rice, wheat and maize Pulse beetle Callosobruchus chinensis, C. maculatus Pulses, bean and gram Tamarind/Groundnut Bruchid Caryedon serratus Ground nut, tamarind and other legumes Cigarette beetle Lasioderma sericorne Wheat flour, cereal bran, peanuts, cocoa beans, spices, turmeric, chillies, ginger, stored tobacco, cigarette
Common name Pest Host Red flour beetle Tribolium castaneum, Broken grains, damaged grains, milled products, machinery Tribolium confusum Long headed flour beetle Latheticus oryzae Saw toothed grain beetle Cryptolestus minutas, Laemophloeus pusillus Dry fruits , maize, cereals and oil seeds Rice moth Corcyra cephalonica Cereals, oilseeds nuts, dry fruits, rice and pulse Fig moth or almond moth Ephestia cautella Indian meal moth Plodia interpunctella Maize, cereals, dry fruits, groundnut, and cereals products
The cowpea weevil attacks field beans and
granaries where it breeds continuously on dried pulses. It attacks chickpeas (Cicer sp.), lentils (Lens sp.), garden peas (Pisum sp.) and mung beans (Vigna sp.). The damage is distinctive. Larvae feed and develop inside the seed and when adults emerge they leave a neat circular exit hole. Each adult consumes approximately 25% of the seed from which it develops. Heavy infestation causes the commodity to heat. This results in loss of quality and mould growth.
long slender snout
and color varies from medium brown to black
and there are no wings under the wing covers, so the species is flightless
a kernel, into which she deposits an egg
hundred and fifty eggs
by the squared-off appearance at the front of the body
range from reddish brown to dark brown
trapped in pheromone-baited traps at harvest
female can lay up to 500 eggs
identified by a sweetish, musty odor in the storage. This odor is a result of the male-produced aggregation pheromone that has been demonstrated to be an effective lure for use in traps
1.6 to 3.0 mm long by 0.9 to 1.7 mm wide
brown markings on elytra. Females are slightly larger than males and lighter in color
segmented antennae
segments
do not fly and feed very little
therefore, its spread is probably dependent on movement of infested goods or in containers where it may be transported while in diapause
clubbed antennae
more often associated with milled products
material is present in the stored grain especially if grain moisture is more than 12%
to 450 eggs over a lifespan that may be as long as eighteen months
a large infestation of flour beetles
brownish gray, slightly less than 1/2 inch long, with a long fringe of hairs on the wings
without markings; the hindwings are gray
infesting a variety of grain and food
however are most often found in corn and wheat
attack standing grains in the field
broken grains and flour.
grains and forming lump and feed from inside it. Larvae before pupation wander about and leave a lot
which reduces marketing quality of the grains.
with a wing span of about 15 mm, without any markings on the wings but veins are slightly darkened. Head bears a projected tuft of scales. Moths are short lived but realise a fecundity of 150—200 eggs per female within a few days after emergence. Larval period is 25-35 days in summer and may be extended in winter.
10mm) long when at rest and have a wing spread of about 1/2 to 3/4 inch (18 to 20mm)
dirty gray but the tip half of the wing is rusty brown or nearly bronze
Indian meal moth to be easily distinguished from other household moths
kinds of stored foods. Coarsely ground grains and cereal products are commonly infested
beetle, with the head bent down nearly at a right angle to the body
1/10 of an inch long
are saw-like and the head is somewhat retracted
weeks, during which time each female may lay as many as 100 eggs
identified by their very long antennae
rusty grain beetles are about half the length of the body
recorded from wheat, flour, oilseeds, cassava root, dried fruits, and chilies
lifespan of up to nine months
brown beetle about 1/10 of an inch long
structure of the thorax, which bears six sawtooth-like projections on each side
kernels and adults and larvae feed on damaged kernels, fines, and occasionally the germ of the intact grain
commonly associated with areas of high temperature and humidity
Prostephanus truncatus is commonly referred to as "larger grain borer" with reference to its close cousin Rhyzopertha dominica which is relatively smaller in length hence referred to as "lesser grain borer". Prostephanus truncatus is approximately 35 millimetres (1.4 in) long as compared to 26 mm (1.0 in) long in Rhyzopertha dominica. At optimum conditions of 80% relative humidity and 32 °C (90 °F), and available food, Prostephanus truncatus completes its life cycle within 27 days. It is a serious pest of dried grains especially maize and dried cassava in West Africa.
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Wheat Mungbean PICS Control PICS Control 1
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