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can reduce alfalfa yields dramatically, particularly with the second cutting when weather is warmest. Spotted alfalfa aphid, broadly spread in Australia, sucks sap and injects salivary toxins into the leaves. Registered insecticides or chemical controls are sometimes used to prevent this, and labels will specify the withholding period before the forage crop can be grazed or cut for hay or silage. Alfalfa is susceptible to root rots, including Phytophthora,

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