. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. Habitat: Infested al- falfa seed may be found in volunteer plants, along roadsides, in surrounding alfalfa fields, in chaff stacks, or scattered on the ground in alfalfa fields. Control: Cultivating in the fall with a springtooth harrow to a depth of at least 1 inch to bury infested seed followed by irrigation, aids in reducing chalcid numbers. Cutfing and re- moval of hay during May will delay and reduce populations. Destroy or bum chaff stacks and screenings by the first o
. Agricultural plant pest control : a study manual for commercial and governmental pesticide applicators . Weeds; Pests. Habitat: Infested al- falfa seed may be found in volunteer plants, along roadsides, in surrounding alfalfa fields, in chaff stacks, or scattered on the ground in alfalfa fields. Control: Cultivating in the fall with a springtooth harrow to a depth of at least 1 inch to bury infested seed followed by irrigation, aids in reducing chalcid numbers. Cutfing and re- moval of hay during May will delay and reduce populations. Destroy or bum chaff stacks and screenings by the first of April and remove vol- unteer and waste area alfalfa plants to also re- duce populafions. There are several spe- cies of Chalcidoidea that are natural para- sites of the alfalfa seed chalcid that attack the larvae and pupae. Adult seed chalcid ~^^ ^^ / \J wL/^ ^ i! 1 / w ^ / X See previous section (alfalfa hay, page 101) for description. ikriys - Yrankliniella spj). Life cycle: Thrips are small, slender, quick- moving insects less than 2 mm long. Damage: The adults and nymphs feed by rasp- ing flower and leaf surfaces and sucking up the exuding juices. This injury can distort flower racemes and potentially damaging the seeds. Habitat: Thrips are found in all crop environ- ments including greenhouses. Control: Almost all pro- grams involving the use of insecticides to control other injurious insects will reduce thrip populations. Therefore, chemical con- trol is not recommended when applied solely for Adult thrips 103. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Montana. Dept. of Agriculture; Hinck, Laura; Johnson, Kim; Mullin, Barbara H; Montana. Agricultural Sciences Division. Helena, Mont. : Montana Department of Agriculture
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