Tirathaba Bunch Moth and Termite Management for Oil · PDF fileTirathaba Bunch Moth and...
Transcript of Tirathaba Bunch Moth and Termite Management for Oil · PDF fileTirathaba Bunch Moth and...
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Tirathaba Bunch Moth and Termite Management for Oil Palm Planting on Peat Soils
Peter Lim
Apical (M) Sdn. Bhd.
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INTRODUCTION - The woody nature of tropical peat attracts termite infestation from the time of planting. It is estimated 3-5 % casualties each year if not detected early and effectively treated. - The hot and humid condition of peat soils encouraged the spread of the Tirathaba bunch moth when the palms approach maturity. In severe infestations, > 50 % crop losses. - These two pests if not properly managed using the IPM approach, pest outbreaks can occur, resulting in economic crop losses due to reduction in palm stand and FFB yield.
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A new oil palm planting on peat
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Termite infestation on 7 month old palm
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Tirathaba infestation on 20 month old palm
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Integrated Pest management (IPM)
• IPM is defined as a pest management system that utilizes suitable techniques and methods (esp. sanitation practices, biological control in a compatible manner, to maintain the pest populations at levels below those causing economic injury and crop losses.
• The focus is on early detection through regular monitoring/census of pest damage and use of selective pesticides.
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Main components of IPM
• ALERT - Early detection by regular surveillance and monitoring pest populations and damage symptoms.
• CENSUS - To determine if pest population levels have reached threshold values and when to start treatment.
* A trained P&D census team for each estate, is important. • TREATMENT - Application of selective chemical with
minimum impact on natural enemies/beneficial insects and environment.
• POST TREATMENT CENSUS - Provides feedback on the efficacy of the treatment and when to stop application.
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Tirathaba management
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Life cycle of Tirathaba mundella
Incubation of eggs 4-5 days Larva 14-16 days
Pupa 9-12 days
Adults 8-9 days
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Caterpillar : 2-3 cm
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Healthy bunch
Tirathaba infested bunch
Tirathaba census on FFB platform
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Analysis of Free Fatty Acid (FFA) content
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Effect of Tirathaba infestation on Free Fatty Acid content
% FFA
Healthy bunches 1.5
Tirathaba infested bunches 6.2
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Healthy bunches
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Average weight of healthy bunches
- 25 kg
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Tirathaba infested bunches
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Average bunch weight Tirathaba infested bunches - 16 kg ( 36 % reduction)
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Tirathaba census
• First stage census done on FFB platforms during FFB grading. When infested bunches > 5 %, carry out systematic census.
• Census 10 % trees ( all trees every tenth rows).
• Interval of census – every month
Category % trees/infested bunches Spray method Low >5-25 Selective Moderate >25-50 Selective Serious >50 Blanket
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Results of a Tirathaba control trial
% Bunches infested by Tirathaba Date of Bt WP Cypermethrin (5%) Control Assessment (1g/liter) (1ml/liter) 7/8/2006 76.0 75.2 72.8 18/9/2006 52.6 63.6 91.2 7/10/2006 33.5 72.6 94.8 15/11/2006 14.9 67.8 95.2 30/11/2006 4.5 62.0 97.5
Bt – Bacillus thuringiensis ( variety Kurstaki at 16,000 IU/mg)
Trial location - Riau, Indonesia.
Age of palms - 7 years
30 treated palms/treatment.
Spraying carried out every 2 weeks.
Total rounds of spraying - 6.
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Date commenced - 7/8/2006 Infestation on bunches - 76.0 %
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Spraying with Bt 1gm/liter water
Date - 7/10/2006 ( 2 months after treatment ) Percentage infestation - 33.5 %
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Date - 30/11/2006 (3 months after treatment) Percentage infestation - 4.5 %
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Elaeidobius kamerunicus
> 2000 /male inflorescence on palms sprayed with Bt
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A natural predator of Tirathaba caterpillars
Earwig – (Chelisoches moris )
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Palms sprayed with cypermethrin.
Population Elaeidobius kamerunicus greatly reduced
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Tirathaba spray procedure
• Harvest all seriously infested bunches first.
• Remove all harvested infested bunches to road sides to expose to direct sunlight. Spray with cypermethrin till wet.
• If palms are under-pruned, carry out a round of pruning together with sanitation harvesting of the rotten bunches.
• Commence 1st round of spraying when > 5 % palms showed
infestation.
• Spray at 2-weekly intervals with Bt at 1 gm/litre water.
• Normally 4-6 rounds of 2-weekly sprayings will be required.
• Stop spraying when > 95 % of bunches are shiny black colour.
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Harvest all seriously infested bunches first
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Ensure all bunches are completely harvested
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Carry out a round of sanitation pruning together with removal of rotten bunches at same time.
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Target spray on the infested bunches, not frond bases
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Allocate 1 sprayer per palm row
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Top up pump at the end of each row with Bt at 1 g/litre water.
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Use extended lance for tall palms
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Use a 2 litre hand-sprayer for shorter supplied palms
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Stop spraying when > 95 % bunches are shiny
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Tirathaba control for palms coming into maturity
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Young palms start flowering and bunch formation
as early as 12-15 months after field planting.
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Carry out castration when > 50 % palms are flowering.
Carry out castration at 2-monthly intervals.
Remove only female inflorescences.
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Stop castration 6 months before official harvesting
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Termite Management
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About termites
• Termite is a serious pest as it kills the palm quickly when not detected and treated early.
• Termites are social insects with a caste system
consisting of workers, soldiers and reproductives. • There are several species of termites found in
peat areas.
• One species (Coptotermes curvignathus) infests and kills palms by feeding on the apical meristematic tissue.
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Stages of termite infestation 1- Initial stage Presence of fresh mudwork on the frond bases, inflorescences, developing bunches and spear region. At this stage the spear and upper fronds are still green. Can expect full recovery when palm treated at this stage. If not treated, it will take 4-6 weeks to reach the next stage. 2- Intermediate stage Discoloration of the spear and the upper 2-3 young fronds to yellowish brown. At this stage, the recovery rate after treatment will be relatively low, generally < 50%. 3 - Advanced stage The spear and the upper 3-4 fronds start to dry up, turning brownish. The spear becomes rotten rotten and gradually collapse. The recovery rate after treatment at this stage will be very poor at this stage.
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Stages of termite infestation
1 2 3
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Stage 3
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Termite census and spray procedure
• Census all palms ( 100 % census) every month by a trained P&D census team.
( Census other important pests such as rhinoceros beetle damage at the same time ).
• Other field personnel esp. harvesters and loose fruit collectors can
be trained to assist in early detection of termite infested palms.
• For infested palms, spray with Fipronil 5.0 % w/w - (2.5ml/5L water/palm). • Organization of workers
Census team - 1 mandore - 4 census workers Spray team - 1 mandore - 4 sprayers.
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Palm
row
Termite census – 100% in all blocks
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Marking of infested palms with rafia strings
On the first palm of a row with infested palms, indicate the number of infested palms by the same number of knots.
Tie a piece of rafia string at the frond tip of an infested
palm.
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Spray procedure
• Spray half the Fipronil solution onto the spear/crown region till wet.
• Spray the other half of the Fipronil solution around the trunk and base of the infested palm.
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The mudwork is moist when the termites are active
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Spray 2.5 litres of the Fipronil solution
into the crown region till wet
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Spray the other half of the solution around the trunk and palm base
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About 1 month after treatment, the mudwork dried up and no live termites detected.
1-2 new healthy young fronds will emarge
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Conclusions • In the cultivation of oil palm on tropical peat soils, the 2 important pests are the Tirathaba bunch moth and Coptotermes termite. • If not detected early and treated effectively using the IPM
approach, outbreaks can occur, resulting in economic crop losses due to reduction in yield and palm stand.
• Considerable costs and management inputs will be
required to control these 2 important pests during outbreak situations.
• Training and retraining are important, to ensure cost-
effective management of these 2 key pests in peat soils.
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