Transcript management of bean common mosaic virus in french beans

MANAGEMENT OF BEAN COMMON
MOSAIC VIRUS IN FRENCH BEANS
(Phaseolus vulgaris) THROUGH
CONTROL OF VECTORS
MANG’ERA EDWIN
(CROP PROTECTION MAJOR)
SPECIAL PROJECT PROPOSAL SUBMITTED TO
THE DEPARTMENT OF CROP PROTECTION
AND PLANT SCIENCE
SUPERVISOR: Dr. Miano
INTRODUCTION
• Common beans originated from Latin America then taken to England
from Mexico in the 16th century by Spaniards.
• It was introduced in Africa by Spaniards and other parts of the
tropics. It has different cultivars ie dwarf, bush and climbing varieties.
• Beans are a good source of nutrients, source of income and holds a
great promise for fighting hunger.
FRENCH BEANS
• It is a tender warm season vegetable harvested when green grown in
Meru, Naivasha, Kirinyaga and varieties grown include army,paulista
and julia.
• Matures faster in warmer areas and picking is after 9 weeks.
VECTORS
• Vectors pose a great threat to French beans since lead to high yield
loss for example aphids can cause up to 50% yield loss.
BEAN COMMON MOSAIC VIRUS
 It is seed borne but transmitted by aphids. Infected plants
have fewer pods with small dark green spots, ring like
lesions on the leaves and stunted growth.
 It can also be transmitted mechanically or through pollen.
 Symptoms include leaf rolling, dark green patches on the
leaves, malformation of primary leaves, mosaic(distinct
necrotic or chlorotic lesions)
 Control.
APHIDS
 Black bean aphid are black to brown in colour, feed by
sucking plant sap. It is widely distributed and on feeding on
infected plants it carries the virus in the mouth parts and
transmits it on healthy plants while feeding.
 CONTROL
PROBLEM STATEMENT
 Optimal production is a challenge to farmers mostly small scale due to
high disease incidence, attacks from field, storage and post harvest
pests. Lack of access to improved bean varieties and poor crop
husbandry.
 Bean common mosaic virus has caused a major threat since it is spread
by vectors with piercing and sucking mouth parts mostly aphids. The
disease is seed borne thus difficult to detect.
 Use of inorganic pesticide pollutes the environment due to residues left
and also affects non target crops.
JUSTIFICATION
 The use biopesticides in the control of aphids to manage spread of bean
common mosaic virus is advisable since it is environmentally friendly. It
is bio degradable hence thus not leave residues in the soil.
OBJECTIVES
• OVERALL OBJECTIVE
To reduce crop loss due to infection by virus.
• SPECIFIC OBJECTIVE
To determine the effect of bean common
mosaic virus through the control of aphids.
MATERIALS AND METHODS
The project will be carried at the college field station
and the materials include French beans (Army
variety),biopesticide (neem mark0.03EC,active
ingredient Azadirachtin 0.03%),organic
pesticide(Malthion),fertilizer D.A.P,hand hoe and
land.
METHODS
 Land preparation will done by disc
ploughing,followed by harrowing. Trials will
be laid in a complete randomized design1.5
by 1.5m plots, replicated 3 times and 50cm
apart.
 Each plot will carry 4 rows at a spacing of 45
by 15cm.control plots will not be treated.
 Data will be from all plots with aphid
infestation incidence and be analyzed by
analysis of variance.
WORK PLAN
ACTIVITIES
1ST
QUARTER
1. Project proposal writing
xxx
2ND
QUARTER
2. Land preparation
xxx
3. Planting
xxx
4. Crop management
practices
3RD
QUARTER
4TH
QUARTER
xxx
5. Data collection and
analysis
xxx
6. Report writing and
presentation
xxx
REFERENCES
 KARI(1996).focus on agricultural research for sustainable
development in changing economic environment –proceedings of
the fifth KARI scientific conference.
 Purseglove J.W(1974) Tropical crops:dicotyledons:284-286.
Longman group Ltd.
 Cesar Cardona & Ashok K. Karel (1990) Key insects and other
invertebrate pests of beans. In insect pests of tropical legumes.
Edited by S.R. Singh.:184 – 188. John Willey & sons Ltd.
 Paul kimani (2006) Snap beans for income generation by small
farmers in East Africa in Horticultural insights 2006 vol. 2
 Nderitu, J. H., Buruchara, R. A. and Ampofo (1997). Integrated pest
management for beans. African Highlands Initiative.
THANK YOU AND
GOD BLESS YOU ALL