The Renewable Natural Resources-Research & Development Centre (RNR-RDC, Yusipang) is labeled with a new name, Research & Development Centre-Organic Agriculture, the only organic research centre in the country. The centre has been functioning as an organic centre for more than a decade ever since its declaration in 2004. It will no longer be functioning with the national mandate of forestry research as it was till date. Accordingly, the centre is now placed under the Department of Agriculture, which was previously under the Department of Forest & Park Services.
With the advent of all the recent changes in the
organizational structure and it having secured a new place, I am anticipating
for more focused, prioritized, need-based research activities that will cater
to the challenges of the farming community.
With the centre having secured a new name and letter head lately, I take privilege in briefly reporting about my organic pest management
trial. After having performed the trial last year with significant result, I
was over ambitious to the attempt of repeating it twice this year. That didn't
work out owing to my full-time engagement in the Royal Bhutan Flower Exhibition.
I managed to layout the trial as soon as I was relieved of the responsibility.
My second attempt was counteracted by incessant downpour and
a disease named club root. Club root is caused by a soil-borne pathogen which
survives in soil for more than 10 years even in the absence of host. It is
characterized by club-like swelling of the roots, which in turn disrupts the natural
uptake of water and required nutrients through the xylem. The infected plants
exhibits wilting during the daytime. Crop rotation with non-Brassica crops and
liming (since pathogen multiplies rapidly in acidic soils) are recommended.
Though I established my trial in a plot which was previously grown with
potatoes, it did not spare my crop.
Except for the aforementioned hurdles, my treatments under
study did extremely well in guarding my crop from pest infestation. Weekly
spray of garlic brew, stinging nettle leaf extract, wood vinegar and Artemisia
leaf extract kept pests at bay and I was able to harvest a clean, healthy lot
of cabbage heads as was the case last year too. Unlike last year's result where stinging nettle was found to be the most effective botanical repellent with corresponding highest yield (details can be accessed from the blog link: http://horticulturetg.blogspot.com/2016/03/evaluation-of-bio-repellents-on-pest_30.html), this year's data shows garlic brew treated plots with minimum number of plants with insect feeding damage followed closely by stinging nettle and the highest yield recorded in artemisia leaf extract treated plots.
The one and the only plant with major feeding damage in the entire plot. |
A Slight mark of insect infestation; minimal damage to cabbage head. |
It is also my aim to
access whether the impact could be due to certain abiotic conditions like
weather parameters. Last year, I conducted the trial early in the season and harvested
it by first week of June. Exactly the opposite, I established my trial in the
3rd week of June(peak monsoon) and harvested in the last week of August this
year. In both the cases, I was able to reap my crop without any severe
infestation of pest. There weren't any case of unmarketable produce.
Healthy Cabbage Heads.
Healthy Cabbage Heads.
Glimpse of fresh, healthy harvested cabbage heads. |
I also took the positive criticism I received on the
frequency of the bio-repellent preparation into inclusion this year. I prepared
the bio-repellents weekly last year to retain the active ingredient and the
efficacy of the repellents. However, I resorted to a single time preparation of
the bio-repellents in the beginning, which were then stored and sprayed during
the entire duration of the crop. This seems to have an equal impact as that of
the bio-repellents being prepared on weekly basis.
In my upcoming attempt, I wish to study in a greater detail
the active ingredients present in each of these botanicals; the mechanism by
which they exhibit pest repelling properties and most important of all,
determine the most effective rate of their application. Keeping in mind the
lessons I have learnt and to curb the excuses(though some were inevitable) I
have made, I am determined to embark on my next attempt with a greater degree
of alertness, cautiousness and seriousness.
If we are to gear towards our Organic Mission by 2020, or gradually thereafter; I think it is imperative that we find out other alternatives for synthetic agro-chemicals. This would be challenging but it would usher us with numerous benefit in the long run like minimized environmental degradation, enhanced and sustained soil health, reduced health hazards and ultimately the harmonious co-existence of all the living beings.
If we are to gear towards our Organic Mission by 2020, or gradually thereafter; I think it is imperative that we find out other alternatives for synthetic agro-chemicals. This would be challenging but it would usher us with numerous benefit in the long run like minimized environmental degradation, enhanced and sustained soil health, reduced health hazards and ultimately the harmonious co-existence of all the living beings.