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Piercing and Sucking Insect Pests


2. Piercing and Sucking Insect Pests
The mouth parts of these insects are shaped tike injection needles and are thus adapted to piercing (that is penetrating into the plant part) and sucking (that is removing plant fluid).

here is my post on biting and chewing insects

you can also read more here on insects

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 lea 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






Figure 2.8.2A: Cotton Stainer



DIAGRAM


Figure 2.8.2b: Aphid

3. Boring insect Pests
These are insects that bore into plant tissues and seeds, kamples 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 fftich 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 Ear worms Maize 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.

roles of government in agriculture

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.

you can read the classification of crops here

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

read about animal diseases and parasites here

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

you can read about crop pest here in detail

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


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

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

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Agricultural biology topics


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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