Cooperative Economic Insect Report, Vol. 21: March 19, 1971 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Cooperative Economic Insect Report, Vol. 21: March 19, 1971

Alfalfa weevil populations were lower in some Northeast States due to the effect of several parasitic Hymenoptera released for its control. Damage was noneconomic for the third year in Maryland. Alfalfa weevil was the major pest of alfalfa in North Carolina and Missouri, and was economic for the first time in northwest Arkansas and north-central New Mexico. Populations decreased in some Central States but continued to spread in Michigan, North Dakota, Nebraska, Kansas, Oklahoma, Texas, and New Mexico. Damage was extensive in some Western States. Alfalfa weevil was reported for the first time from Florida, Minnesota, and Arizona. Pea aphid was the heaviest in three years on alfalfa in Maryland, but remained light in Virginia and noneconomic in Indiana, North Dakota, and Nebraska. Infestations were heavy in some Central and Western States. Larvae of several noctuid moths caused some concern on alfalfa west of the Mississippi River.

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