PEST MANAGEMENT DECISION GUIDE: GREEN AND YELLOW LIST Striga weed in maize Striga hermonthica Kayongo Prevention Monitoring Direct Control Direct Control Restrictions

l Plough deep, plant early, use short early l Additional relevant crops: l Continously uproot and burn Striga l When planting herbicide treated maize maturing varieties (KH500-53A, KH500-52A, sorghum, millet, upland weeds, 3 weeks at flowering and always wear gloves and other personal PAN3M-01) rice before seed setting to reduce protective equipment. l Plant tolerant varieties like Ua kayongo, l Look out for: dispersal l Follow the instructions on the product label GAF4, WS303, KS 528, FRC 4251R or l Plant sorghum, millet or maize prior l Long (1cm by 0.5cm) and always change gloves or properly wash Purple witchweed (Striga KSTP94 yellowish blotches on to the main season to stimulate hermonthica) (USDA APHIS hands to prevent contaminating other crops. l Rotate (3-6 years) or intercrop with cotton, the foliage and on germination of Striga, then destroy PPQ - Oxford, North Carolina, before the weed can mature and USDA APHIS PPQ, sunflower, legumes to reduce the striga seed uprooting a hustoria and l Always consult recent list of registered set seed Bugwood.org) bank in the soil young parasite seedling pesticides (PCPB). l Avoid dropping maize seed cob on the soil l Curled leaves and l Apply organic and inorganic during harvesting to avoid dispersing the drought-stressed like fertilizers and irrigate during dry l Plant seeds l WHO class II weed appearance of the periods to improve crop stand dressed with (Moderately imazapyr hazardous) (Dressing l Take the soil to KALRO for nutrient analysis plants l Intercrop maize with desmodium, herbicide restricted to seed (N:P:K) as Nitrogen and phosphorous l Stunting and wilting of beans, cowpeas, groundnuts, (registered as companies only). REI deficiencies can accentuate Striga damage plants greengrams to shade and supress StrigAway) 12 hrs. Burn seed and severity the weed l Weeds with purple packages to avoid Purple witchweed (Striga l Uproot and burn crop stubble to prevent flowers at later stages contaminating food, hermonthica) in corn (Zea growth and seeding of Striga l Take action when 1% of water or feed mays) (USDA APHIS PPQ - Oxford, North Carolina, USDA the crop is affected APHIS PPQ, Bugwood.org)

Kenya CREATED/UPDATED: September, 2015 AUTHOR(S): Eunice Ringera (KEPHIS), Lynnette Echessa (MOALF) and Miriam Otipa (KALRO) EDITED BY: Plantwise

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