TYPES OF PEST OF CROPS




pests of crops

1. Classify insect pests into feeding groups
2. Name important field and storage pest of crops
3. Identify nature of damage to crops
4. State preventive and control measures
5. State other important pests of crops
6. Identify the nature of their damage to crops
7. State the preventive and control measures

Classification of crop insect pest into main feeding groups



A pest is an organism which causes damage to crops.

Insect pest are those insects that cause physical damage to crops. Insects belong to the group arthropods.
Generally pests reduce crop yield both in quality and quantity.

1.

Biting and chewing insect pest

The mouth parts of pests in this group are especially adapted to biting and chewing of various plant parts.
The mouth parts are made up of two hard biting jaws (mandibles).

In addition to these,
they also have two jaws (maxillae).
They have two lips – flat upper lip (larum) and lower lip (labium) while the maxillae are used to push the crop parts into the mouth, the mandibles are used for the biting and chewing since they are very strong. These insects can feed on any part of the plant including leaves, fruits, stems, flowers and even roots.

Some common biting and chewing insect pests are beetles, grasshoppers, termites, crickets, caterpillars of moths and butter flies, locust, army worms and so on.

They feed on many crops such as okro, maize, rice, vegetables, cassava and fruit trees.
DIAGRAM Figure 2.8.1a: Cricket DIAGRAM Figure 2.8.1B: Beetle DIAGRAM Figure 2.8.1c: Grasshopper DIAGRAM Figure 2.8.Id: Caterpillar

2. Piercing and Sucking Insect Pests
The mouth parts of these insects are shaped like injection needles and are thus adapted to piercing (that is penetrating into the plant part) and sucking (that is removing plant fluid).
These piercing and sucking habits of the insects lead to] destruction of plant tissues, development of holes through which disease organisms can enter into the plant system and transfer or harmful germs from diseased plants to healthy ones. All these leads to weakening and eventual death of the plants affected.


Good examples of piercing and sucking insect pests are
aphids (plant lice), cotton stainer, mealy bugs, capsid bugs, and scali insects DIAGRAM Figure 2.8.2A: Cotton Stainer


3.

Boring insect Pests

These are insects that bore into plant tissues and seeds, examples are stem borers of cereals and weevils such as beans, rice M maize weevils.
Other insects pests which may not fall into the above groups have been found to affect crops.

An example is the weaving insect which causes the folding of the leaves of crops particularly vegetables. DIAGRAM Figure 2.8.3: Bean Weevil



NAME OF PEST, CROPS AFFECTED, NATURE OF DAMAGE TO CROPS, PREVENTION AND CONTROL MEASURES






1 Stem borer (Sesamia spp) Cereals e.g. rice, maize sorghum Pest eats up the juicy centres of stems thus causing the crop to collapse and die Burn all crop remains in the farm after harvest, uproot and burn affected crops. Spray with gammaling 20 or DDT.

2 Army worms - Grain crops e.g. Rice, Maize, Sorghum They eat up the leaves and stems of the crops leading to mechanical damage of crops. Plant early. Spray with an insecticide such as gammalin 20.

3 Earth worms--M0aize These larvae bore into the cobs or ears of maize thereby eating up the fresh grains Early planting spray with gammalin 20

4 Aphids Cocoa, groundnut, cowpea They bite and pierce through the outer texture of growing plants. Sucking out the sap leading to stunting, distortion and defoliation in affected plants Spray affected crops with insecticides

5 Pod Borers (Maruca tesulalis) Legumes e.g. Cowpea They cause damage to the tender parts of the plants, by eating up the flower buds and pods. This leads to reduction in yield. Plant with resistant varieties. Spray with gammalin 20 or diagram.

6 Variegated Grasshopper (Zonocerus variegates) Yam, vegetables, rice, cassava, etc. Eats up leaves of plants. Growing point and stem may be eaten too. Spray with gammalin 20 or vetox 85

7 Yam Beetle (Heteroligus meles) Yam Feeds on tubers of yams in the soil causing holes on them Dust yam planting materials with aldrin dust before planting.

8 Cassava mealy bug (phenacoccus Manihoti) Cassava Affected plants become stunted since the internodes are reduced. The tip begins to develop bunchy tops, the leaves die off finally, the whole plant looks like a candle stick. Plant early. Dip cassava cuttings in 0.1% Rogor or ultracide solution for 1 minute before planting

9 Capsids Cocoa The insects attack young shoots of cocoa and introduce toxic saliva into the plant. This kills the plant Spraying with gammalin 20

10 Cotton stainer (dysdercus superstitutious) Cotton Attacks opening cotton bolls thus staining the lint Spray with insecticide

11 Weevils Rice, maize, beans Eat up the cotyledons of stored products Spray with insecticide

12 Fruits worm The larva eats up the fruits Spray with vetox 85

13 Termites Oil palm, cassava, sugar cane, yam, etc They destroy roots and seedlings of plants especially when young Spray with aldrex 40. Water crops regularly in the dry season.

14 Boll worms Cotton They eat up succulent boll. Bolls drop off prematurely Pick and burn affected bolls. Spray with insecticides

8.3 Other Pests of Crops


1. Bird

These attack mainly grain crops such as maize, rice, sorghum and barley. They also attack fruits in the field.

Examples of these birds are Weaver birds
(Quela), parrots, etc. DIAGRAM Figure 2.8.4: A Bird.

(a) Nature of Damage: They peck out planted seeds, eat up grains on the field and destroy leaves of some plants such as oil palm. They also eat ripe fruits such as pawpaw, mango, and cashew.

(b) Control:
1. Use of scare crows
2. Spraying chemieals such as furadan with aircraft,
3. Shooting with catapult or gun. DIAGRAM Figure 2.8.5:
Scare Crow for birds and mammalian pest in farms.

2. Rodents
These include rats, grass-cutters, African rabbits and hare. DIAGRAM Figure 2.8.6: A Rodent
(Grass-cutter)

(a) Nature of Damage:
They cut down and eat various parts of the crop especially cereal and tuber crops. Grass-cutters eat up rice, young palm seedlings and maize plants. Rats eat up stored produce like tubers and grains. Hare eat up planted grains.

(b) Control:

(i) Use of poison baits
(ii) Use of traps
(iii) By shooting with guns,
(iv) Use of rat gums.

3. Other Mammalian Pests
These include monkey, deer, antelopes and bush pig.
They do a lot of damage to crops in the farm by uprooting eating them up.

For example, monkey eat up plantains, banana maize and cocoa pods.

Control:
(i) Trapping (ii) Shooting with gun.
DIAGRAM Figure 2.8.7a: Monkey

DIAGRAM Figure 2.8.7b: Giant Rat (Cricetomys gambianus).

STUDY QUESTIONS 1. How can insect pests be classified using their feeding habits?
2. (a) Name 10 insect pests you know. (b) For each one, slate the crop it affects, the damage done to the crop and control measure of the pest.
3. (a) Apart from insect pest, mime three other pests you blow. (b) Which crops do they affect? (b) flow can they be controlled?




4. Classify the following into biting and chewing, piercing and sucking, and boring insect pests:- Beetles, Aphids. stem boreres, caps ids, weevils, locusts, mealybugs, crickets, cotton stainer, 5. Itemise >>>>> you would use for rodents attack on your farm.
for the purpose of this subject, here is a few lists of pests of crops,
African black beetle (Heteronychus arator)
Amnemus weevil (Amnemus sp.)
Ants, Seed harvesting (Pheidole)
Aphids (various)
Aphid, Soybean (Aphis glycine)
Aphid, Spotted alfalfa (Therioaphis trifolii)
Aphid, Turnip (Lipaphis erysimi)
Aphid, Wheat (Rhopalosiphum padi)
Armyworms (various)
Armyworm, Common (Leucania convecta)
Armyworm, Dayfeeding (Spodoptera exempta)
Armyworm, Lawn (Spodoptera mauritia)
Armyworm, Lesser (Spodoptera exigua)
Armyworm, Northern (Mythimna separata)
Armyworm, Sugarcane (Leucania stenographa)
Australian plague locust (Chortoicetes terminifera)
Bean fly (Ophiomyia phaseoli)
Bean leafroller (Omiodes diemenalis)
Bean looper or Mocis (Mocis alterna)
Bean podborer (Maruca vitrata)
Bean spider mite (Tetranychus ludeni)
Beet webworm (Spoladea recurvalis)
Black field cricket (Teleogryllus commodus, T. oceanicus, Lepidogryllus parvulus)
Black field earwig (Nala lividipes)
Black leaf beetle (Rhyparida nitida)
Black sunflower scarab (Pseudoheteronyx sp.)
Bluegreen aphid (Acyrthosiphon kondoi)
Blue oat mite (Penthaleus major)
Brown bean bug, Large (Riptortus serripes)
Brown bean bug, Small (Melanacanthus scutellaris)
Brown flea beetle (Chaetocnema sp.)
Brown mirid (Creontiades pacificus)
Brown pasture looper (Ciampa arietaria)
Brown shield bug (Dictyotus caenosus)
Brown wheat mite (Petrobia latens)
Bruchid, Cowpea (Callosobruchus maculatus)
Cabbage aphid (Brevicoryne brassicae)
Cabbage moth (Plutella xylostella)
Castor oil looper (Achaea janata)
Click beetle (Agrypnus spp.)
Clover springtail (Sminthurus viridis)
Cluster caterpillar (Spodoptera litura)
Cockroach, Wingless (Calolampra spp.)
Common armyworm (Leucania convecta)
Common grass blue butterfly (Zizina labradus)
Corn aphid (Rhopalosiphum maidis)
Corn earworm (Helicoverpa armigera)
Cotton aphid (Aphis gossypii)
Cotton bollworm (Helicoverpa armigera)
Cotton harlequin bug (Tectocoris diophthalmus)
Cotton leafhopper (Amrasca terraereginae)
Cotton leafperforator (Bucculatrix gossypii)
Cotton looper (Anomis flava)
Cottonseed bug (Oxycarenus luctuosus)
Cotton seedling thrip (Thrips tabaci)
Cotton tipworm (Crocidosema plebejana)
Cotton webspinner (Achyra affinitalis)
Cowpea aphid (Aphis craccivora)
Cowpea bruchid (Callosobruchus maculatus)
Cricket, Black field (Teleogryllus commodus, T. oceanicus, Lepidogryllus parvulus)
Crop mirid (Sidnia kinbergi)
Cutworm (Agrotis spp.)
Dayfeeding armyworm (Spodoptera exempta)
Diamondback moth (Plutella xylostella)
Dried fruit beetle (Carpophilus spp.)
Locust, Yellow-winged (Gastrimargus musicus)
Locust, Spur-throated (Austracris (Noamdacris) guttulosa)
Loopers (various)
Looper, Bean or Mocis (Mocis alterna)
Looper, Brown pasture (Ciampa arietaria)
Looper, Castor oil (Achaea janata)
Eastern false wireworm (Pterohelaeus spp.)
Earwig, Black field (Nala lividipes)
Etiella moth (Etiella behrii)
False wireworm (Pterohelaeus and Gonocephalum spp.)
Flea beetles, Brown and Redheaded (Chaetocnema and Nisostra sp.)
Flower beetle (Carpophilus spp.)
Grasshoppers and locusts (various)
Grasshopper, Wingless (Phaulacridium vittatum)
)
Helicoverpa species (armigera, punctigera)
Jassids (leafhoppers) (various)
Lawn armyworm (Spodoptera mauritia)
Leafhoppers (jassids) (various)
Leafhopper, cotton (Amrasca terraereginae)
Leafhopper, lucerne (Austroasca alfalfae)
Leafhopper, maize (Cicadulina bimaculata
Leafhopper, vegetable (Austroasca viridigrisea)
Legume webspinner (Omiodes diemenalis)
Lesser armyworm (Spodoptera exigua)
Light brown apple moth (Epiphyas postvittana)
Locust, Australian plague (Chortoicetes terminifera)
Locust, Migratory (Locusta migratoria)
Looper, Cotton (Anomis flava)
Looper, Sugarcane (Mocis frugalis)
Looper, Soybean (Thysanoplusia orichalcea)
Looper, Tobacco (Chrysodeixis argentifera)
Looper, Vegetable (Chrysodeixis eriosoma)
Mocis trifasciata no common name
Pantydia spp .
Lucerne crownborer (Zygrita diva)
Lucerne flea (Sminthurus viridis)
Lucerne leafhopper (Austroasca alfalfae)
Lucerne leafroller (Merophyas divulsana)
Lucerne seed wasp (Bruchophagus roddi)
Lucerne seed web moth (Etiella behrii)
Maize leafhopper (Cicadulina bimaculata)
Maize thrips (Frankliniella williamsi)
Mealybug (Family Psuedococcidae)
Mealybug, solenopsis (Phenacoccus solenopsis)
Midge, Sorghum (Stenodiplosis sorghicola)
Migratory locust (Locusta migratoria)
Mirids (Creontiades and Sidnia spp.)
Mites (various)
Aphid, Bluegreen (Acyrthosiphon kondoi)
Aphid, Cabbage (Brevicoryne brassicae)
Aphid, Corn (Rhopalosiphum maidis)
Aphid, Cotton (Aphis gossypii)
Aphid, Cowpea (Aphis craccivora)
Aphid, Green peach (Myzus persicae)
Aphid, Oat (Rhopalosiphum padi)
Aphid, Pea (Acyrthosiphon pisum)
Aphid, Rice root (Rhopalosiphum rufiabdominalis)
Aphid, Rose grain (Metopolophium dirhodum)
Mite, Bean spider (Tetranychus ludeni)
Mite, Brown wheat (Petrobia latens)
Mite, Blue oat (Penthaleus major)
Mite, Peanut (Paraplonobia spp.)
Mite, Redlegged earth (Halotydeus destructor)
Mite, Strawberry spider (Tetranychus lambi) Greenhouse whitefly (Trialeurodes vaporariorum)
Green peach aphid (Myzus persicae)
Green mirid (Creontiades dilutus)
Green vegetable bug (Nezara viridula)
Green stink bug (Plautia affinis)
Grey cluster bug (Nysius clevelandensis

Mite, Two-spotted (Tetranychus urticae)
Mocis alterna (bean looper)
Mocis frugalis (sugarcane looper)
Mocis trifasciata
Monolepta (red-houldered leaf beetle) , (Monolepta australis)
for the comprehensive lists A-Z please read here my credit goes to them


8.3 Other Pests of Crops
1. Bird
These attack mainly grain crops such as maize, rice, sorghum and barley. They also attack fruits in the field. Examples of these birds are Weaver birds (Quela), parrots, etc.

DIAGRAM
Figure 2.8.4: A Bird.

(a) Nature of Damage: They peck out planted seeds, eat up grains on the field and destroy leaves of some plants such as oil palm. They also eat ripe fruits such as pawpaw, mango, and cashew.
(b) Control

1. Use of scare crows
2. Spraying chemieals such as furadan with aircraft,
3. Shooting with catapult or gun.
DIAGRAM

Figure 2.8.5: Scare Crow for birds and mammalian pest in farms.

2. Rodents
These include rats, grass-cutters, African rabbits and hare.





DIAGRAM
Figure 2.8.6: A Rodent (Grass-cutter)
(a) Nature of Damage: They cut down and eat various parts of the crop especially cereal and tuber crops. Grass-cutters eat up rice, young palm seedlings and maize plants. Rats eat up stored produce like tubers and grains. Hare eat up planted grains.

(b) Control:
(i) Use of poison baits
(ii) Use of traps
(iii) By shooting with guns,
(iv) Use of rat gums.

3. Other Mammalian Pests
These include monkey, deer, antelopes and bush pig.
They do a lot of damage to crops in the farm by uprooting eating them up. For example, monkey eat up plantains, banana maize and cocoa pods.

Control:
(i) Trapping

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HERE YOU WILL FIND EVERY AVAILABLE TOPICS ABOUT AGRICULTURAL SCIENCE AND BIOLOGY. AND THE LINKS TO THEIR VARIOUS SOURCES.
1. DEVELOPMENT OF AGRICULTURE
2. IMPORTANCE OF AGRICULTURE
3. SUBSISTENCE AGRICULTURE
4. COMMERCIAL AGRICULTURE
5. PROBLEM OF AGRICULTURAL DEVELOPMENT
6. SOLUTIONS TO POOR AGRICULTURAL DEVELOPMENT
7. AGRICULTURAL LAWS AND REFORMS
8. ROLES OF GOVERNMENT IN AGRICULTURAL DEVELOPMENT
9. AGRICULTURAL POLICIES
10. PROGRAM PLANNING IN AGRICULTURE
34.
FORESTRY
35. WILDLIFE CONSERVATION
36. FACTORS AFFECTING LAND AVAILABILITY
37. TOPOGRAPHY
38. SOIL
39. BIOLOGICAL FACTORS
40. SOCIAL-ECONOMIC FACTORS
41. ENVIRONMENTAL FACTORS AFFECTING AGRICULTURAL PRODUCTION
42. CLIMATIC FACTORS AFFECTING AGRICULTURAL PRODUCTION
43. TEMPERATURE
44. RAINFALL
45. WIND
46. SUNLIGHT
47. SOLAR RADIATION
48. BIOTIC FACTOR AND AGRICULTURAL PRODUCTION
49. PESTS
50. BIRDS
51. DISEASES
52. SOIL MICRO-ORGANISMS
53. SOIL PH
54. ROCK FORMATION
55. IGNEOUS ROCK
56. SEDIMENTARY ROCKS
57. METAMORPHIC
58. SOIL AND ITS FORMATION
59. FACTORS OF SOIL FORMATION
60. LIVING ORGANISM
61. PARENT MATERIALS
62. SOIL FORMATION TOPOGRAPHY
63. PROCESS OF SOIL FORMATION
64. WEATHERING
65. PHYSICAL WEATHERING
66. CHEMICAL WEATHERING
67. PRESSURE
68. WATER
73. BIOLOGICAL WEATHERING
74. CHEMICAL AND BIOLOGICAL COMPOSITION OF THE SOIL
75. SOIL WATER
76. MICRO AND MACRO NUTRIENTS
77. SOIL MICRO ORGANISM
78. PROPERTIES OF SOIL
79. SOIL STRUCTURE
80. SANDY SOIL
81. CLAY SOIL
82. LOAMY SOIL

83. SOIL TEXTURE
84. IDENTIFICATION OF SOIL TYPES THROUGH EXPERIMENTS
85. RETENTION OF WATER BY VARIOUS SOIL TYPES
86. DETERMINATION OF SOIL PH REACTION
87. COLORIMETRIC DETERMINATION OF SOIL PH LEVEL
88. PH SOIL TEST
89. PLANT NUTRIENTS
90.
MACRO NUTRIENTS IN GENERAL
112.
THE MAINTENANCE OF SOIL FERTILITY
113. CROP ROTATION
114. APPLICATION OF ORGANIC MANURES
115. FARM YARD MANURE
116. APPLICATION OF INORGANIC MANURE

117. LIMING
118. FARMING PRACTICES
119. BUSH BURNING
120. CLEARING

121. FERTILIZER APPLICATION
122. ORGANIC MANURING
123. FARM YARD MANURE

124. HUMUS
125. COMPOST
126. CROP ROTATION
133. FARM POWER AND MACHINERY
134. SOURCES OF FARM POWER
135. HUMAN SOURCE
149.
PLOUGHS
142.
FIELD MACHINES
157.
PLANTERS
164.
SIMPLE FARM TOOLS
165. AGRICULTURAL MECHANIZATION
166. THE CONCEPT OF MECHANIZATION



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