Annual report . he spring brood at-tacks tillers or laterals whichwere unharmed in the autumn,dwarfing and weakening the stemso that the grain usually lodgesbefore ripening or else fails todevelop fully. Causes of the outbreak. Ex-treme dryness at the time of thewheat harvest in 1911 promotedshelling and resulted in an un-usually large crop of volunteerwheat, which latter was greatlyfavored by late summer to the weather reportsFig. 1 Base of infested wheat stem of this locality shows that in Julyshowing flax-seeds or puparia un- I9II Le Roy wag favored w[th der the leaf sheaths
Annual report . he spring brood at-tacks tillers or laterals whichwere unharmed in the autumn,dwarfing and weakening the stemso that the grain usually lodgesbefore ripening or else fails todevelop fully. Causes of the outbreak. Ex-treme dryness at the time of thewheat harvest in 1911 promotedshelling and resulted in an un-usually large crop of volunteerwheat, which latter was greatlyfavored by late summer to the weather reportsFig. 1 Base of infested wheat stem of this locality shows that in Julyshowing flax-seeds or puparia un- I9II Le Roy wag favored w[th der the leaf sheaths (original) • ., ,. a precipitation amounting to inches, most of this occurring between the 15th and the 25th. There was an additional precipitation of nearly an inch in early August, followed by almost three-fourths of an inch in mid-August and nearly two inches the latter part of that month, while in September there were nearly three inches in the early part of the month and at least fair rains near the. REPORT OF THE STATE ENTOMOLOGIST I912 33 middle and the latter part, the total for September amount-ing to inches. Such conditions are obviously well adapted tothe early starting and vigorous growth of volunteer wheat andwould result in the production of an abundant succulent tissueand thus produce a condition almost ideal for the development ofthis pest. There may easily have been a supplemental brood onmany areas prior to the appearance above ground of the regularlysown wheat. This extra brood would mean a more severe in-festation in the fall and consequently serious damage in the would appear as though the elements had combined to bringabout an abundant crop of volunteer wheat, practically an extendedsowing of a trap crop, which latter had not been plowed underearly enough so as to destroy the pests and prevent further damage., Losses in 1912. Winter injury should not be overlooked at theoutset. Mr F. C. Walker of South Byron stated that ice remainedo
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