The effect of some essential oils and chitosan against pests and pathogens is also proved. These may include lemongrass, thyme and black seed essential oils followed by grape oil. Data also showed that moringa, bitter orange and jojoba essential oils had inhibitory effect against pathogens. I am sure you can download related papers.
Neem aplicado sobre poblaciones bajas de insectos susceptibles y estados iniciales de desarrollo en un programa MIP puede ser muy útil. Puede utilizarse en mezcla con algunos aceites para ampliar el espectro de control.
Farmers should be trained in effective pest management … plant pesticides like neem and tobacco have to be promoted’
October 20, 2017, 2:00 AM IST TOI Q&A in The Interviews Blog | Edit Page, India, Q&A | TOI
The recent death of farmers in Yavatmal district of Maharashtra has been an eye-opener on several fronts. It shows traders of hazardous chemicals remain unregulated, farmers lack safety awareness, and the authorities don’t care. Against this backdrop, MS Swaminathan, an architect of green revolution and the founder chairman of MS Swaminathan Research Foundation, advocates greater use of modern science for sustainable agriculture and rural development. Excerpts from an interview with D
Yavatmal farmers have drawn national attention. With farmers forced to lay thrust on use of chemical fertilisers and hazardous pesticides for cultivation, were these deaths waiting to happen?
The deaths caused by pesticide are fortunately being studied and chronicled now. From the days of DDT (dichloro-diphenyl-trichloroethane) which won a Nobel prize for Paul Hermann Muller, the harmful residual effects of pesticides are known. Thanks to the book ‘Silent Spring’ by Rachel Carson. Unfortunately in our country, there is still no effective regulatory mechanism which can monitor and control the use of harmful pesticides. Farmers have no option but to buy and use those which are recommended by companies and extension agencies.
Experts are blaming the deaths on use of new spray machines. Who should take the blame?
The spray machines themselves may not be able to do harm unless what is sprayed is poisonous. Therefore there has to be attention on both the chemical and the delivery mechanism.
Can formal training be planned and imparted to farmers, since these sprayers are reportedly Chinese made?
Training of farmers in integrated pest management is exceedingly important to protect them during the use of pesticides. I established Krishi Vigyan Kendras attached to agriculture universities for imparting knowledge and skills to farm men and women. They should all be now energised to take up more effective extension and education work on pest management.
Did the change of norms by the Central Insecticides Board catalyse this disaster?
I am not aware of the harm done by the norms fixed by the Central Insecticide Board. This has to be studied carefully by the board itself.
Counterfeits are said to account for around 30% of the more than $4 billion annual pesticide market in India. Why is the system so lax?
It is possible that counterfeits are causing much damage. I have not seen any accurate data, although there are guestimates.
Use of pesticides has risen of late, as GM cotton seeds approved in the early part of this century have reportedly started to lose efficacy. What measures are needed?
Most pesticides lose their efficacy after a few years, because of pest resistance to pesticides. This is why companies go on changing the varieties. In the past, most of the local varieties had built-in resistance and there was also diversity in the crops grown. Genetic homogeneity enhances genetic vulnerability to pests and diseases.
Farmers are committing suicide over debts and now dying due to use of pesticides. Where is Indian agriculture heading?
Suicides are unfortunate since agriculture is a life-giving and not life-taking profession. We should be ashamed of this situation and take remedial action.
There is talk of the need to follow traditional methods in cultivation and to avoid chemicals?
Organic farming and other earlier methods can be effective, provided they can help us improve soil health and plant health. Plant pesticides like neem and tobacco need to be promoted. All this will form part of the integrated pest management system, which should be developed for every major ecosystem and farming system.
Natural is not harmless. There are many natural toxins that are anything but harmless: cyanide, strychnine, nicotine, ricin, and botulinum toxin to name a few. Nicotine is effective, but far from "safe." There are many other commercially available pesticides of natural origin. Pyrethrum is effective, but not to be confused with its chemical derivatives the pyrethroids. Bacteria have helped with B.T. toxins, and things like the spinosads from fungi. One has to match the product with the desired goals from both an ethical and crop protection points of view.
Personally, I prefer natural products like nicotine for aphids. Home gardeners, maybe small farmers, can make a crude spray by soaking tobacco wastes and maybe adding a little soap. But some natural products, like nicotine which is amazingly toxic coming right out of the bottle of concentrate, can accidentally control the farmer instead of the pests.
please, note that plant pesticides like neem and tobacco should be used within IPM frame and this frame differs from one crop/pest to another in order to be effective