1. 2020_CICR Cotton production Package of Practices for cotton 1.pdf, page 6
l0.
Removal of cotton stubbles after last picking, without opting for ratoon crop or
prolonging the crop growth with irrigations and fertilizer applications. This is
essential to break the cycles of problem pests in the system as a whole.
Management Strategy for Pink Bollworm
Since eggs are mostly protected by calyx and the newly hatched larvae bore into the
bolls immediately, it is difficult to manage this pest with insecticides. Therefore, hygienic
methods are more important than chemical control. However, from the available literature the
following integrated methods to control this insect can be suggested.
1).
Grow early maturing varieties so that the cotton bolls mature before the heavy
population of pink bollworm builds up.
2).
Avoid staggered sowing in an area and take up timely sowings.
5
3).
Use of acid delinted seed only.
4).
Adopting efficient and timely agronomic practices such as use of organic manures and
recommended doses of 'N' fertilizers only.
5).
Keep the crop free from weeds.
6).
Regular monitoring for pest builds up with field scouting and
7).
Destroy pink bollworm larvae in rosette flowers and also through periodical removal of
dropped squares, dried flowers and pre-matured bolls, to suppress pest population in
the initial stage.
8).
Avoid ratooning and summer cotton.
9).
Allow cattle, sheep and goats to graze upon immature green bolls and attacked bolls
after final picking to prevent carry-over of the pest to the next season.
10).
Prompt removal and destruction of cotton stubbles to prevent carry over of pest to next
season.
11).
Restrict the movement of cotton seed from other areas/states
12).
Need based use of insecticides.
a). Seed fumigation with methyl
tablets/1000 cuft for 24 hours.
2. 2020_CICR Cotton production Package of Practices for cotton 1.pdf, page 5
5.
Monitoring pests by using sticky, pheromone and light traps.
The adult monitoring
should be supported by egg and larval monitoring following sequential sampling
technique at frequent intervals in case of boll worm. Bird perches should be arranged
@ 10 to 20 per acre for encouraging bird predation on bollworm larvae.
6.
The build up of broad spectrum predators-spiders, coccinellids and chrysopids
should be synchronised in other cultural operations. Release of Trichogramma egg
parasite @ 50000/ha and Chrysopa egg larval predator @ l00,000/ha, should be
done as soon as the first brood of bollworms are noticed.
7.
Removal of top leaves by topping of cotton plants when maximum egg laying
of Helicoverpa armigera is noticed formation of 16 to 18 sympodial branches.
8.
Application of Helio NPV @ 500 LE/ha or Neem seed kernel extract (5%) in synchrony
with early larvae of Heliothis. Neem oil formulation to manage whitefly initially.
9.
...
Whitefly triazophos /profenophos 2ml/lt+5ml neem oil.
Mealy bug 1.Stem application; 2. 1ml dichlorovas + 2ml methyl parathion/malathion or 3ml
quinalphos/lt.
Bollworms
• Spotted bollworm, American Bollworm, Tobacco cut worm and pink bollworm :
monocrotophos 2 ml/lt or quinalphos 3 ml/lt or chlorpyriphos 2.5 ml/lt or endosulfan 2
ml/lt or carbaryl 3 g/lt or acephate 1 g/lt or indoxacarb 1 ml/l or thiodicarb 1.5g/lit
or spinosad (Tracer) 0.6ml/lt or emamectin benzoate 0.45g /lt.
Bollworms attack cotton from 50-60 DAS such as Heliothis, tobacco budworm, spotted
bollworm and pink bollworms which requires integrated management techniques (IPM).
The ETL for boll worms is 10% losses, 1 larvae, or egg of heliothis plant-1 or one group of
eggs of semilooper per 10 plants or 10 % bolls/ locules afftected by pink boll worms.
INTEGRATED PEST MANAGEMENT IN COTTON
l.
Growing cotton as a rotation crop rather than a continuous crop
year to restore the phenomenon of polyculture in the system.
year
after
2.
Application of chemical fertilizer as supplement to organic or biological fertilizers as per
the recommended doses.
4
3.
[1] https://storage.googleapis.com/dara-c1b52.appspot.com/daras_ai/media/17394f4a-ba21-11ed-8626-02420a00010a/2020_CICR%20Cotton%20production%20Package%20of%20Practices%20for%20cotton%201.pdf#page=6
[2] https://storage.googleapis.com/dara-c1b52.appspot.com/daras_ai/media/17394f4a-ba21-11ed-8626-02420a00010a/2020_CICR%20Cotton%20production%20Package%20of%20Practices%20for%20cotton%201.pdf#page=5