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Shubham Kr Thakur (agrilearner.com)

Pests of Sugarcane (Saccharum officinarum)

1. Early shoot borer Chilo infuscatellus Snellen (Crambidae: Lepidoptera) Distribution: It is found to attack sugarcane in Tamil Nadu, Andhra Pradesh, Punjab, U.P., Bihar, West Bengal, Madhya Pradesh, Rajasthan and Maharashtra. Nature of damage: The borer enters into young shoots and tunnels downwards. The upper portion of the central leaf …

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Pest of Millets

A. Sorghum (Sorghum vulgare) 1. Sorghum shoot fly Atherigona soccata Rond. (Muscidae: Diptera) Distribution: Occurs throughout the country. Nature of damage: The maggots bore into the shoot of young plants, a week after germination to about one month and as a result the central shoot dries up resulting in ‘dead …

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Pests of Wheat and Barley

1. Brown Wheat Mite Petrobia lateens (Muller) (Arachnida: Tetranychidae) Distribution: It occurs on wheat in the summer rainfall regions and expected to be severe where drought conditions are frequently encountered. Nature of damage: The brown wheat mite feeds on sap from leaves by inserting two needle-like stylets into the leaf …

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Role of Stomata in Transpiration

Since most of the water is lost through stomata, plants regulate the degree of stomatal opening and closing to reduce the water loss. It has been seen that stomata show periodic opening and closing during the day (diurnal variation) depending upon the heat and light, water content of the cell …

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Transpiration & Factors affecting transpiration

TRANSPIRATION The loss of water from aerial parts of the plant in the form of water vapour is termed transpiration and in the form of liquid is termed guttation. Transpiration may occur through three main sites in the plant : 1. cuticle 2. lenticels 3. stomata. (i) Cuticle : Cuticle …

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SOIL WATER & ABSORPTION OF WATER BY PLANTS

(i) Gravitational Water. It is the water that drains downwards through the soil. The level to which it drains is called the water table. The water table of a place differs in depth due to rainfall. The gravitational water lies far below and is generally not available to plant roots. …

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