Exactly. Not only indian but also the world agricultural productivity is now declining due to disease, pest and climate change. It is imposible to ensure food security unless this pandemics is well managed. One of the mechanisms to maximize the land productivity by reducing disease and pest from small farm plot is intercropping of compatible crop types, mulch farming and others. This agronomic conservation measures has a potential to reduce the pandemics
Plant protection measures are inevitable regarding crop production and food security. For protecting crop from diseases and insect pests or other enemies we should take measures starting from land preparation before planting. Then have to choose healthy and proper seed or seedling. After growing plants proper and strict monitoring should be implemented, and if any problem arises whether insect or disease attack or nutrient deficient measures should be taken immediately. Finally harvesting carefully. Without proper plant protection measures the term "Food Security" will never be meaning any worth.
Well, that's the case for the whole globe now. To proceed towards any approaches, we need to analyse and identify the drivers for increasing losses due to diseases and pests either due to climate change, pests dynamics due to weak quarantine, susceptible cultivars etc. After having accurate determination of the cause, we can project relevant strategies for the resolution of the problems.
We can't reduce all losses caused by pests and diseases. Even if 50% losses can be managed it will definitely create a huge difference. Currently IPM (Integrated Pest Management) and IDM (Integrated Disease Management) are found most successful tools for plant protection. I have noticed that the lack of technical assistance as well as wider gap between farmers and researchers are major limiting factors. There are an important role of various agricultural research institute, agricultural universities and extension services. So, that these institutions should be extended to each and every tract of the country.
The figure might be greater. The solution is to implement long term sustainable crop protection measures that are environmental friendly and adaptable to farmers. Government and non-government institutions should always create a strong link with farmers and agriculture commodity retailers. Integrated pest management approaches should be implemented contextually at both pre- and post-harvest stages of crop production.