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EFFECT OF INSECTICIDE ON MANGO AND ITS CONTROL

Mangoes are an important smallholder and commercial crop in Nigeria, and one of the most important commercial crops in Nigeria. To achieve good yields with top quality fruits, mango growers currently rely on regular insecticide applications. This leads to increased costs, the reduction of natural predators and parasitoids that help control the insect pests, increased pest resistance to insecticides residues in the fruits and environmental pollution.
Green ants are efficient predators of a wide range of insect pests in many tropical fruit crops and they are abundant and widely distributed in Southeast Asia. Previous work in Indonesia and preliminary results from cashew crops in Nigeria indicate that green ants can control some of the main pests of mangoes.

 

CHAPTER ONE

  1. INTRODUCTION

1.1                                        BACKGROUND OF THE STUDY
Mango (Mangifera indica L.), a member of family Anacardiaceae (Singh, 1968; Litz, 1997), is known as “king of fruits”. It is one of the most significant trees on earth and is now eaten worldwide.
The mango crop is attacked by a number of insect pests that deprive the trees of its nutrients. Mango mealybug (Drosicha mangiferae Green) is the most destructive pest in Indo-Pakistan (Prassad & Singh, 1976; Yousuf, 1993). It is a polyphagous insect, which has been recorded to feed on numerous plant species. Insecticides should only be used when all other methods of control become ineffective for the control of insect pests.
Chemicals are also an important part of integrated pest management (IPM) program and have a number of advantages over alternative methods for insect control. For example, insecticides are always in ready form, easily accessible and a wide range of insecticides are available in the market for the control of insect pest. Intensive, highagricultural production systems have traditionally used synthetic pesticides to eliminate pests as the main tool and sustain the lowest amount of economic damage to the crop.
Insecticides are considered to be the rapid method for the control of insect pests to overcome losses caused by insect pest to crop. Despite various environmental problems caused by the use of pesticides, it is still single most widely used method of insect pest control.
An insecticide is a substance used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers. Insecticides are claimed to be a major factor behind the increase in agricultural 20th century's productivity. Nearly all insecticides have the potential to significantly alter ecosystems; many are toxic to humans; some concentrate along the food chain.
Insecticides can be classified in two major groups as systemic insecticide which have residual or long term activity and contact insecticides, which have no residual activity.
Furthermore one can distinguish natural insecticides, such as nicotine, pyrethrum and neem extracts, made by plants as defenses against insects, inorganic insecticides, which are metals, versus organic insecticides, which are organic chemical compounds mostly working by contact.
The mode of action describes how the pesticide kills or inactivates a pest. It provides another way of classifying insecticides. Mode of action is important in understanding whether an insecticide will be toxic to unrelated species, such as fish, birds and mammals.
1.2                                     AIM AND OBJECTIVE OF THE STUDY
Insecticides are considered to be the rapid method for the control of insect pests to overcome losses caused by insect pest to mango. Despite various environmental problems caused by the use of pesticides, it is still single most widely used method of insect pest control.
The specific aim of present study was to identify the impact of insecticide on mango and how it can be controlled
1.3                                       TYPE OF ACTIVITY OF INSECTICIDE
Systemic insecticides become incorporated and distributed systemically throughout the whole plant. When insects feed on the plant, they ingest the insecticide. Systemic insecticides produced by transgenic plants are called plant-incorporated protectants (PIPs). For instance, a gene that codes for a specific Bacillus thuringiensis biocidal protein was introduced into corn and other species. The plant manufactures the protein, which kills the insect when consumed. Systemic insecticides have activity pertaining to their residue which is called "residual activity" or long-term activity.
Contact insecticides are toxic to insects upon direct contact. These can be inorganic insecticides, which are metals and include arsenates, copper and fluorine compounds, which are less commonly used, and the commonly used sulfur. Contact insecticides can be organic insecticides, i.e. organic chemical compounds, synthetically produced, and comprising the largest numbers of pesticides used today. Or they can be natural compounds like pyrethrum, neem oil etc. Contact insecticides usually have no residual activity.
1.4                                      LIST OF INSECTICIDES FOR MANGO

Type

Common Name

Trade Name

Carbamate
  

BMPC

Diacarb 50 EC
Hopkill 50 EC

Carbaryl

Sevin 50 WP
Sevin 85 WP
Sevin XLR
Marsbyl 50 WP
Marsbyl 85 WP
Zacarb 85 WP

IGR

Buprofesin

Applaud 10 WP

Organophosphate (OP)

Dimethoate
Fenitrothion
Fenthion
Methanidophos
Phenthoate
Trichlorfon

Perfekthion 40 EC
Folithion 50 EC
Lebaycid 50 EC
Tirador 600 LC
Pennant 50 EC
Dipterex 95% SP

Pyrethroids (PY)

Cyfluthrin
Cypermethrin

 

 



Deltamethrin

Esfenvalerate
Fenvalerate

Imidacloprid
Lambdacyhalothrin

Permethrin

Baythroid 050 EC
Magnum 5 EC
Smash 5 EC
Cotrin 5 EC
Flash 5 EC
Power Blaster
Cymbush 5 EC
Bugbuster 5 EC
Cypro 5 EC
Bushwack 5 EC
Sherpa 5 EC
Cypex 5 EC
Punis X5.5 EC
Decis 100 EC
Decis 2.5 EC
Sumi-alpha 2.5 EC
Sumicidin 3 EC
Leadmark 3 EC
Kilpes 3 EC
Confidor 100 SL
Karate 1 WP
Karate 2.5 EC
Kafil 10 EC
Corsair 5 EC
Pytox 5 EC

Mixed Formulation
(OP-OP)

(OP-PY)



(PY-IGR)

Others


Malathion +
Fenitrothion
Chlorpyrifos +
Cypermethrin
Chlorpyrifos &
Cypermethrin
Deltamethrin +
Buprofezin
Cartap HCL
Ethenfenprox
Flufenoxuron
Phosalone


Ambithion 100 E

Predator Plus

Blink 275 EC

Stingray 5.625 EC

Dimotrin 50 SP
Trebon 10 EC
Cascade 10 WDC
Zolone 35 EC

 


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