ENTOMOLOGY RESEARCH

 

Entomology research at Holeta Agricultural Research Center has been going on since the inception of the center in 1966. The research outputs of the entomology section at Holeta could be categorized into information and/or technologies: information includes pest lists, damages and losses, epidemiology and population dynamics, and disease/insect pest resistance germplasms that could be used in crop variety development and technology includes recommended chemicals or other control practices that could be applied directly. The research outputs of the section are summarized below.

 

Major Achievements

 

§  Major pre- and post-harvest insect pests of economically important field crops have been identified and fairly documented

§  The insect pest fauna of vegetable crops in the country is catalogued

§  Major insect pests of fruit crops have been identified

§  Some key pests of forest trees are fairly recognized

§  Major insect pests of stimulants and industrial crops have been identified

§  A few key insect vectors of virus diseases have been identified

§  Some indigenous predator and parasitoids of key insect pests have been collected,

§  Identified and fairly documented

§  Few entomopathogens have been collected, identified, documented and laboratory assays carried out against some major insect pests

§  Yield losses due to key insect pests of some cereals, pulses, oil crops, vegetables, citrus and cotton were studied

§  Critical damage period was determined to key insect pests of citrus

§  Economic threshold levels and/or critical damage periods were studied to determine time of insecticide application for some key pests of some cereals, cool season food legumes, cotton, citrus and coffee

§  A few studies have been carried out on the biology, distribution and seasonal abundance of key insect pests of citrus, some vegetables, cereals, pulses, coffee, some oil crops and cotton

§  Effective chemical pesticides have been identified against major insect pests of cereals, pulses, oil crops, cotton, vegetables, coffee, citrus, forest and forest products

§  Studies on cultural control have been carried out on insect pests of major crops;

§  Limited studies on host plant resistance against few major insect pests of important crops have been carried out

§  Few attempts were made on biological and physical control against some key insect pests

§  Significant progress has been made in establishing and implementing EPM programs against some key pests of vegetables, citrus, cereals, cotton and pulses

§  Limited efforts were made in using botanicals to control mainly key storage pests

§  Entomological research attempts focus largely on collection of base line data (identification, documentation, ecological studies) and management aspects using cultural, botanical, acceptable insecticides, bio-control and IPM.

 

 

General objective

 

To generate and present pest management and related technologies and information, which will contribute, in a sustainable way, to the overall increase in crop production and productivity in the country.

 

Specific objectives

§  To identify and document insect pests and their natural enemies and also quarantine pests

§  To study the biology, population dynamics and reproduction behavior of major insect pests

§  To determine the economic losses incurred by the major insect pests identified on different crops

§  To develop reliable and sustainable control and management methods: cultural, chemical, host plant resistance, biological control and integrated pest management methods.

§  Provide training to graduate students, researcher assistants, development agents and farmers and also give advisory services for relevant stakeholders

§  To identify and document insect pests and their natural enemies and also quarantine pests

§  To study the biology, population dynamics and reproduction behavior of major insect pests

§  To determine the economic losses incurred by the major insect pests identified on different crops

§  To develop reliable and sustainable control and management methods: cultural, chemical, host plant resistance, biological control and integrated pest management methods.

§  Provide trainings to graduate students, researcher assistants, development agents and farmers and also give advisory services for relevant stakeholders

 

Major Outputs

 

Survey results

 

A total of 477 named (identified) species belonging to 81 families of 10 insect orders were collected from 48 different plant species and are kept in the insect museum of the section. From the total number of insect species recorded, 144 are identified as important crop pests on 43 different crop plants. These collections are from most parts of the country and are good reference/voucher specimen source for counter checking collections that could be made by students, researchers or development workers from any corner of the country. The section was working on pest problems in small cereals (barley, tef and wheat), highland oil crops (linseed, brassica and noug), and highland pulses (faba bean and field pea), potato, temperate fruits. The general and specific objectives of the section are described below.

Management technologies/information

 

List of usable technologies and information generated in plant entomology

Categories of control method

Host plant

Effective technology on the target pest

Seed dressing insecticides

Barley shootfly

Barley

Imidacloprid (100g/85kg) and Furathiocarb 400CS (148g/85kg)

Russian wheat aphid

Barley

Imidacloprid (100g/100kg)

Chafer grubs

Barley

Imidacloprid (100g/100kg)

Pea aphid

Field pea

Imidacloprid (300g/100kg)

Bruchids

Faba bean

Pirimiphos-methyl 2% Dust (40g/100Kg)

Spray insecticides

Russian wheat aphid

Barley

Pirimiphos-methyl 50% EC (1l/ha)

Pea aphid

Field pea

Pirimicarb 50% WP (1kg/ha)

Pirimiphos-methyl 50% EC (1l/ha)

Dimethoate 40% EC (1.0-1.5l/ha), Tafgor 40%EC(1.0-1.5l/ha)

Red tefworm

Tef

Fenitrothion ULV 1.25l/ha

Black tef beetle

Tef

Carbaryl 85% WP (1.5 kg/ha)

Red spider mite

Cut Rose

Bitoxybacillin @ 7g/liter

Botanicals (Pyrethrum)

Bean bruchids

Faba bean

50 g/q of seed

Potato tuber moth

Potato

700 g/100 liter of water

Botanicals (Berbera (cream))

Bean bruchids

Faba bean

50 g/q of seed

Pea aphids

Field pea

2.69 g powder/1l of water

Host plant resistance

Russian wheat aphid

Barley

3296-15, proven tolerant pure line

Pea aphid

Field pea

Tagegnech and Holeta local-90 (proven tolerant varieties)**

CONTACT ADDRESS

Kemal Ali (PhD),
Coordinator, Entomology Research Program
Tel.: +251
Email: