ROMSO Cyprus Knowledge Base

Analysis of the causes of food grain shortages reveals that approximately 1.07 billion rupees in annual losses occur due to various pests affecting crops. Of this, 37% is attributed to weeds, while 22% and 29% are caused by insects and diseases respectively. Weeds also absorb water from the land, necessitating more irrigation for farmers, making weed control essential.

Crops such as rice, maize, bajra, groundnut, til, gram, and soybean are significant in Indian agriculture and contribute to the country's economy. According to data from recent years, these crops cover an average of 72.6 million hectares of land and produce approximately 105.9 million tons of food grains, with a yield of 95.7 million tons.

Comparing the productivity of both monsoon and non-monsoon seasons reveals significant differences. The productivity of monsoon crops is 1458 kg/hectare, which lags behind that of non-monsoon crops (2005 kg/hectare).

Important crops grown during the monsoon season include rice, maize, bajra, groundnut, til, gram, and soybean. Rice is the primary food crop, cultivated across the country and consumed in large quantities worldwide.

Monsoon crops are susceptible to various factors affecting productivity, including inadequate irrigation and excessive water supply. Weather conditions such as droughts and temperature fluctuations also contribute to weed growth, insect infestations, and diseases, making it challenging for farmers to protect their crops.

Main types of weeds found in monsoon crops:

1. Grass-type weeds:
* Sawn (Echinochloa colona or Echinochloa crus-galli)
* Kodon (Eleusine indica)
* Makda (Dactyloctenium aegyptium)
* Dub (Sorghum halepense)
* Guinea grass (Panicum dichotomiflorum)
2. Broad-leaved weeds:
* Sathi (Drummondia portulacoides)
* Kanakwa (Commelina benghalensis)
* Kondara (Digiaria arvensis)
* Bhangda (Cannabis sativa)
* Spiny amaranth (Amaranthus spinosus)
* Mokoy (Solanum nigrum)
* Large dudhi (Urena lobata)
* Thousand-seed grass (Phyllanthus niruri)
* Water hyacinth (Eichhornia crassipes)
* Borage (Borago officinalis)
3. Cereal-type weeds:
* Mutha (Cyperus iria or Cyperus rotundus)

Damage caused by weed infestations in monsoon crops is higher compared to non-monsoon crops. Weeds can cause significant losses due to competition for water and nutrients, reduced crop yields, and lower quality produce.

Weed types and their characteristics:

* Grass-type weeds have broad leaves with parallel veins and are annual plants.
* Broad-leaved weeds have wide leaves and are mostly biennial or perennial plants.
* Cereal-type weeds have long, narrow leaves and a solid stem with nodes. They also have rhizomes that store food for new plant growth.

Weed infestations cause significant damage to monsoon crops due to competition for resources, reduced yields, and lower quality produce.