41.Name the most widely used commercial compound of ethylene.
The most widely used compund as a source of ethylene is Ethephon. It is an aqueous solution that is readily absorbed and transported within the plant and releases ethylene slowly.
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42.Name the stress hormone.
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43.ABA are derivatives of ?
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44.Namethe three phases of the period of growth
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45.Name a phytohormone which has also been isolated from humman urine.
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46. How 2, 4-D helps in preparing weed- free lawns ?
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47.What does the foliar spray of NAA and 2, 4-D cause in Litchi and Pineapple ?
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48.Which hormone is sprayed on sugarcane for increasing yield ?
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49.What is chemical name of kinetin ?
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50.Which is most widely used hormone in agriculture and why?
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