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Home > Insect Pest Management for Field Crops > Insect Pest Management - Alfalfa > Alfalfa-Category III: Plant height, 24 to 30 inches for alfalfa weevil control

Alfalfa-Category III: Plant height, 24 to 30 inches for alfalfa weevil control

Plant height, 24 to 30 inches for alfalfa weevil control

Remarks: Use short-residual insecticides. Early cutting may be advisable. Stubble sprays may be necessary.

Cost of insecticide application per acre ->	$8	$10	$12	$14	$16
Value of hay per ton:	(Number of larva per 30-stem sample)
$80	78	97	117	137	157
$100	63	78	94	110	126
$120	52	65	78	91	105
$140	45	56	67	78	90
$160	39	49	58	68	79

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