Package of practices for managing major insect-pests of Soybean

Name of the insect

What to do

When to do

Why to do

How to do

What not to do

Why not to do

Stem fly (Melanagromyza sojae)

Treat the seed with Thiamethoxam 30 FS @ 10g/kg seed

Before sowing


To reduce seedling mortality caused by early infestation and to maintain proper plant population

Treat the seed with insecticide

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Blue beetle (Cneorane spp.)

Spray the crop with Quinalphos 25EC @ 1.5 l/ha

At seedling stage when population exceeds 4 beetles / m

To prevent damaging the apical growing part by the beetles

Spray with atleast 500 lit. of water per ha.

Do not use less quantity of water.

Insufficient water will not allow proper coverage of insecticide.

Semiloopers (Chrysodeixis acuta, Gessonia gemma and Diachrysia orichalcea)

Use recommended dose of fertilizers including Potash. Use any of the following:
Beauveria bassiana @1.0 kg/ha, or
Bacillus thuringiensis @ 1.0 kg/ha, or
Quinalphos 25 EC @ 1.5 l/ha or Chlorantraniliprole 20 SC @ 100 ml/ha or Indoxacarb 14.5 SC @ 500 ml/ha or pre-mix insecticide Betacyfluthrin + Imidacloprid @ 350 ml/ha

At sowing.


 

 

At the incidence of semiloopers,

 

When the population exceeds 3-4 larvae/m

Potash gives strength to plants against insects and diseases.

To reduce the population below ETL and prevent defoliation by larvae.

Broadcast or apply through ferti-seed drill.

 

 

Spray with 500 lit water per ha.

Do not mix fertilizer with seed. Do not use insecticides not recommended for soybean. Do not use urea on standing crop.

It will affect the germination.
Un-recommended insecticides do not have proven efficacy against target insect-pests.Leads to more luxuriant growth, which attracts more defoliators.

Tobacco caterpillar (Spodoptera litura)

Install Pheromone traps.

Survey the field thoroughly and remove plant parts /plants having gregarious stage of caterpillars.

Spray the crop with Sl NPV @ 250 LE/ha, or


Quinalphos 25EC @ 1.5 l/ha, or Indoxacarb 14.5 SC @ 500 ml/ha, or Spinetoram 11.7 SC @ 450 ml/ha

After about 20 days of sowing.

 

Start from 25-30 days after sowing.


 

 

7-10 days after adult catches are observed in pheromone traps.

When larvae are in 3rd instar or above.

 

 

 

To monitor the incidence.


 

 

 

 

 

 

To inflict early instar mortality.


 

 

To kill later stages of larvae.

10-12 / ha.


Mix UV protectant like indigo (1 TSF / tank).

With 500 lit of water pe r ha.

Do not hold the pheromone septa with bare hands.
Do not mix with any chemical insecticide.
Do not spray chemical insecticides in bright sunlight.

Its effect will be reduced. It might reduce the efficacy.
Efficacy will be reduced drastically.

Gram pod borer (Helicoverpa armigera)

Install Pheromone traps.

Spray the crop with Ha NPV @ 250 LE/ha, or

 


Quinalphos 25EC@ 1.5 l/ha, or
Indoxacarb 14.5 SC @ 500 ml/ha.

After about 20 days of sowing

 

7-10 days after adult catches are observed in pheromone traps.

When larvae are in 3rd instar or above.

To monitor the incidence.

To inflict early instar mortality.


 

To kill later stages of larvae.

10-12 / ha.


Mix UV protectant like indigo (1 TSF / tank).


With 500 lit of water per ha.

Do not hold the pheromone septa with bare hands.
Do not mix with any chemical insecticide.
Do not spray chemical insecticides in bright sunlight.

Its effect will be reduced.
It might reduce the efficacy.
Efficacy will be reduced drastically.

Girdle beetle (Obereopsis bevies)

In small field, remove girdle beetle infested plants / plant parts

 


In larger fields, spray the crop with either
Triazophos 40EC @ 0.8 l/ha, or with
Thiacloprid 21.7 SC @ 650 ml/ha or pre-mix insecticide Betacyfluthrin + Imidacloprid @ 350 ml/ha

Within 7-10 days of noticing drooping of leaves due to ring made by females.

Within 7-10 days of noticing drooping of leaves due to ring made by females.

To reduce intensity of infestation.

 

 


To kill the eggs or early stage grubs which is still in the softer plant parts.

Pluck the infested plant part from below the girdles and burry them outside the field


Use proper quantity of water, i.e. 500 l/ha

Do not use excessive seed rate.

 

 

 

 

Do not mix un-compatible insecticides.

More plant population results in more infestation.

 

 

 

This might reduce the efficacy of the insecticides.

White fly

(Bemisia tabaci)

Seed treatment of soybean with Thiamethoxam 30 FS @ 10 g per kg seed;

 

Install Yellow Sticky Traps

 

Remove YMV infected soybean plants

 

Spray of pre-mix insecticide Betacyfluthrin + Imidacloprid @ 350 ml/ha for the control of white flies at later stage.

Before sowing

 

 

 

 

 

On incidence of white fly adults

 

 

On appearance of symptoms

 

 

On incidence of white fly adults

 

 

 

Above measures should be taken up on community basis

To reduce seedling mortality caused by early infestation of white fly.

 

To attract and destroy white fly adults;

 

To get rid of the inoculum;

 

 

 

To control white fly and further spread of YMV disease.

 

To avoid movement of white flies.

Treat the seed with insecticide

 

 

 

 

Paint 1x 2 size boards with Yellow colour and apply a layer of mustard oil / grease and fix 10-15 traps per ha in the field

Do not use susceptible varieties of moong or urd bean in vicinity of soybean.

 

Do not use synthetic pyrethroids for control of insects.

These pulse crops are hosts for white fly.

 

 

 

 

Synthetic pyrethroids cause resurgence of white flies.