Papaya mealy bug – a new threat to sericulture

[bapuj...@gmail.com]

Papaya mealy bug – a new threat to sericulture


Papaya mealy bug is a polyphagous sucking insect pest and has been
recorded on more than sixty host plants in India.
But its serious attack was recorded only in a few economically
important crops such as papaya, mango, pomegranate, citrus, beans,
tomato, potato, pepper and cotton. In other plants it exists as a
minor pest.
However sudden outbreak of any minor pest is common owing to various
reasons.
The recent trend in the population built-up of papaya mealy bug on
mulberry, the sole food plant of silkworm, indicates its emerging pest
status especially in South India where mulberry is cultivated
intensively.

Infestation
Papaya mealy bug infestation is typically observed as clusters of
cotton like masses on tender stem and veins of mulberry leaves as the
insect secretes a white waxy coat over its body.
The adult female lays 100-600 eggs which hatch into nymphs in about
ten days. The nymphs crawl actively to search for feeding sites and
settle in clusters on leaves and stems.

One generation
The pest completes one generation in a month. The symptoms appear on
the leaves as chlorosis (yellowing), deformation and premature drop.
Hence, feeding with papaya mealy bug infested mulberry leaves
adversely affects the growth of silkworm and silk production.

Cultural method
Planting of highly susceptible host plants such as papaya or hibiscus
in the vicinity of mulberry garden should be avoided.
Plugging of the infested twigs and leaves and their burning during
early stage of infestation is the best method of eradication of the
pest.
Indiscriminate use of insecticides in mulberry fields should also be
avoided as they induce resistance in the pests and destroy its natural
enemy population.

Biological control
Release of Cryptolaemus montrouzieri, an effective predatory ladybird
beetle at 125 adults per acre twice a year at the interval of six
months keeps the pest population suppressed.
Spraying dimethoate (0.05 per cent) controls the pest effectively.
Leaves can be fed to silkworms 15 days after spraying the insecticide.

N.Sakthivel
Regional Sericultural
Research Station
Central Silk Board, Salem
Tamil Nadu: 636 003

[BALA SUBRAMANIAN]

Dear All This is Balasubramanian from Coimbatore. As per my experience Mealy bug cannot be control by Dimethoate and Cryptolaemus. It need integrated method to control. Ants worked as vector for spreading of mealy bug. As a first step, Carburyl dust should be applied in callor portion of earch plant or It can be made as a bountry line of Plots. Spray Profenofos ( TATA make) 2.5 ml/ lit to control mass papulation of mealy bugs Infected portion need to isolate and destryed. Spray Dimethoate or Dimethoate + Profenofos ( 2 ml + 2.5 ml) to control further infection. Present mild climatic condition is suitable for application of Bio products, Basillus subtilis + Verticilium + Bevaria mix. Application should be done in 3 to 6 pm. I have experienced with all these technologies and it was developed me. So Requested you all to adopt this technology in trail baisis first, Once you feel satisfy you can use this technology Thanking you Balu ( Call me for any discussions 919442253021) --- On Fri, 10/7/09, bapuj...@gmail.com <bapuj...@gmail.com> wrote:

Love Cricket? Check out live scores, photos, video highlights and more. Click here.

[V.Balasubramani]

Hallo Balasubramanian from Coimbatore, please introduce yourself.

Thanks

Dr.V.Balasubramani,PhD.

Associate Professor (Ento)

---

From: BALA SUBRAMANIAN <bal...@yahoo.co.in>
To: plantprote...@googlegroups.com
Sent: Thursday, 9 July, 2009 11:50:03 PM
Subject: Re: Papaya mealy bug – a new threat to sericulture

[prowinwin patel]

thank you providing good info for gujarat farmers

thanking you

pravin

 

 

PATEL AGRO SEEDS.

Royal complex,Dhebar road,
RAJKOT 360 002 Gujarat. INDIA

www.patelagroseeds.com
email: patel...@yahoo.com 

91-281 - 222 99 66

---

From: V.Balasubramani <venkatbal...@yahoo.com>
To: plantprote...@googlegroups.com
Sent: Friday, July 10, 2009 12:33:44 PM

[ayyappan regupathy]

Dear Dr Balu
I am happy that you are working to find management strategy for the new invasive papaya mealy bug.
I want to make few suggestions.
kindly avoid mix of two insecticides especially with similar mode of action. dimethoate and profenofoa are anticholinesterases. The repeated use will pave way for the development of resisitance to these chemistries faster.
I tried biocontrol agents- the mix of Beaveria + Poecelomyces + verticillium.But I am not convinced with its infection. Could you please inform the published data based on your trial.
Regards
AR

\Prof. A. Regupathy
Consultant ( Insecticide - Toxicology )
Formerly * Prof.& Head,Dept. of Agric. Entomology,
* Dean, Agricultural College & Research Institute, Madurai
Tamil Nadu Agricultural University Coimbatore-641 003, India.
Address for correspondence
31, Azhagar Illam
Revathy Nagar
P.N.Pudur Post
Coimbatore -641 041
Phone: Res:091-422-2423284; Mobile- 94433 43633



--- On Thu, 9/7/09, BALA SUBRAMANIAN <bal...@yahoo.co.in> wrote:

> Love Cricket? Check out live scores,
> photos, video highlights and more.
> Click here
>
> >
>
>
>

Looking for local information? Find it on Yahoo! Local http://in.local.yahoo.com/

[V.Balasubramani]

Dear Sir,

It was not me who wrote about the mealy bug control. I have sent a mail requesting him to introduce with details.

regards

Balu (VB)

---

From: ayyappan regupathy <regup...@yahoo.com>
To: plantprote...@googlegroups.com
Cc: balu d2oil <bal...@yahoo.co.in>; entomo tnau <tnau...@yahoogroups.co.in>
Sent: Friday, 10 July, 2009 9:26:22 AM

Subject: Re: Papaya mealy bug – a new threat to sericulture

Dear Dr Balu
I am happy that you are working to find management strategy for the new invasive papaya mealy bug.
I want to make few suggestions.

kindly avoid mix of two insecticides especially with similar mode of action. dimethoate and profenofoa are anticholinesterases. The repeated use will pave way for the development of resisitance to these chemistries faster..

---

Yahoo! recommends that you upgrade to the new and safer Internet Explorer 8.

[ayyappan regupathy]

OK
But the text seems as though it was sent by you.

AR
\Prof. A. Regupathy
Consultant ( Insecticide - Toxicology )
Formerly * Prof.& Head,Dept. of Agric. Entomology,
* Dean, Agricultural College & Research Institute, Madurai
Tamil Nadu Agricultural University Coimbatore-641 003, India.
Address for correspondence
31, Azhagar Illam
Revathy Nagar
P.N.Pudur Post
Coimbatore -641 041
Phone: Res:091-422-2423284; Mobile- 94433 43633

--- On Fri, 10/7/09, V.Balasubramani <venkatbal...@yahoo.com> wrote:

> From: V.Balasubramani <venkatbal...@yahoo.com>
> Subject: Re: Papaya mealy bug – a new threat to sericulture
> To: plantprote...@googlegroups.com
> Date: Friday, 10 July, 2009, 9:40 AM
> Dear Sir,
> It was not me who wrote about the mealy bug control. I
> have sent a mail requesting him to introduce with details.
>
> regards
> Balu (VB)
>
>
>
>
>

> Yahoo! recommends that you upgrade to
> the new and safer
> Internet Explorer 8.
>
> >
>
>
>

[Manickan Balasubramanian]

Dear Dr. Regupathy: No I did not send any or intend to send any. It was with so many mistakes Bala --- On Fri, 7/10/09, ayyappan regupathy <regup...@yahoo.com> wrote: