Show rotation plan to foil chinch bugs locate legume crops so as to isolate small grain corn and grass by A L 1 lanz aut chlof chief of boll ment mant floada university of at illinois service bric threatened with the heaviest chinch bug infestation ever recorded in the history of the state illinois farmers should consider revising their rotations as a means cleans of partially protecting their 1934 corn crop by this Is meant the location ot of legume crops in the rotation so as to isolate the small grain corn and grass fields where the chinch bugs are prone to breed and feed it has been proved that legumes are distasteful to this insect pest and separating the bugs buga favorite crops with legumes legume la Is suggested as one of several control measures furthermore the addition of 0 one or more legumes will improve th tha fertility of the land on which they ar ara grown A five year rotation supplying this dual purpose may consist of corn oats clover corn and soybeans in this case not only Is 00 60 per cent of the farm in legumes but 80 per cent to la la in cash crops one crop of corn in I 1 completely set off between two legumes which in many cases will prevent serious serl 0 us damage from chinch bugs the fact that the oats oata field will have a spring pring seeding of clover may deter rapid multiplication of the insects la in this crop it if the clover gets a strong early start when wheat Is grown with a maximum of corn a rotation of corn corn beans wheat and clover can be ba planned an important feature of this combination la Is that the small groin grain crop which Is 13 always the early breeding ground of the chinch bug Is isolated from the corn crops by a legune legume on either side with a good spring seeding of clover in the wheat this crop Is not susceptible to the bugs where a four year rotation of corn oats wheat and clover Is followed tt a protective revision would be to substitute soybeans tor for the oats this would carry the isolation advantages of the wheat rotation above and with a good stand of clover in the wheat would keep 73 75 per cent of the land in legumes throughout the growing season |