Showing posts with label mealybug. Show all posts
Showing posts with label mealybug. Show all posts

Sunday, December 20, 2009

Organic mealy bug repellent

In the previous post I identified the Papaya mealy bug - Paracoccus Marginatus on our papaya.

So - I checked out what are the possible organic responses and found some good resources:

PAN Germany: Describes the uses of chili

Golden Harvest Organics: A list of insects and pests, and appropriate organic repellents

Canadian Country Woman: Describes various bug sprays

The Urban Gardener, and A Canadian in King Parakramabahu's Court recommend neem oil, which I haven't tried yet.

So - I decided to use chili, as we have a regularly producing organic chili plant, and garlic (from the market).

This was the harvest
organic chili garlic insect repellent

chopped up with garlic - it smelt nice! :)
organic chili garlic insect repellent

and put in a jar to steep in the sun (because I was too lazy to boil it, which would probably be more effective)
organic chili garlic insect repellent

and then I strained it, and diluted with some water and biodegradable washing up liquid. I used an old surface cleaner spray bottle (WW's idea, instead of buying a new one) to spray it on.
organic chili garlic insect repellent

One papaya was too far gone already,
papaya attacked by mealy bugs malaysia

so we pulled it up and burnt the top :( For the other ones, we first sprayed off the bugs with water, then sprayed on the repellent.

James Missier commented on a previous post that some ants can bring mealy bugs onto plants.
ants with mealy bugs papaya malaysia

I don't know if these ants brought them, but they certainly were found wherever there were mealy bugs
ants with mealy bugs papaya malaysia

I know that ants are perhaps the only other species, apart from humans, that have 'domesticated' other animals for their own purposes. And it's pretty fascinating. But not on my plants! Argh! :/
ants with mealy bugs papaya malaysia

Anyway, I'm happy to say that after spraying every two-three days for about a week, there don't seem to be any more bugs (touching wood).







Sunday, November 29, 2009

Papaya mealy bug - Paracoccus Marginatus

A while ago, WW noticed some white stuff on our papayas, and eventually I got round to looking closer
papaya mealy bug malaysia

clusters of foam, it seemed like to me, and I wasn't sure if it was a real problem or not... but it spread
papaya mealy bug malaysia

and it was clearly affecting the growth...
papaya mealy bug malaysia

a closer look revealed what looked like eggs
papaya mealy bug malaysia

but I still couldn't see the bugs... I thought I spotted it with this brown beetle-like insect, but it was only when I looked at the photos afterwards, that I noticed the white fluffy-like insects.
papaya mealy bug malaysia

Upon investigation, I'm somewhat concerned to find out that it is an invasive Papaya mealy bug - Paracoccus Marginatus. It doesn't restrict itself to papaya, and it's a "polyphagous sucking insect pest and has been recorded on more than sixty host plants in India." (The Hindu); 'polyphagous' means it eats different types of fruit and plants, and A Canadian in King Parakramabahu's Court (in Sri Lanka) reports it attacking lime trees, curry leaf and jasmine! Argh!

There's a detailed paper on this (by Alison Walker, Marjorie Hoy and Dale Meyerdirk), describing how it originated in Central America, has moved into Asia and tropical regions... It can be controlled by the introduction of other insects or "parasitoids", but that ain't much use to me...

Stay tuned for an attempt at organic control of this pest. All advice is welcome.