The Institute calls for partnership between companies in the manufacture of crop chemicals and seeds and BMGF to expand the use of coated seeds in addressing pests and diseases and gives the example of BASF's StrigAway, which has been touted as solution in the battle against striga, commonly known as witchweed
, now a major threat especially among maize farmers in East Africa.
Management of witchweed
Striga hermonthica and stem borers in sorghum Sorghum bicolor through intercropping with green leaf desmodium Desmodium intortum.
2] salt to Striga inhibited seeds germination and haustorium formation which was the main issue in controlling witchweed
The species appearing on both lists are Cogongrass (Imperata cylindrica), Giant Hogweed (Heracleum mantegazzianum), Old World Climbing Fern (Lygodium microphyllum), Tropical Soda Apple (Solanum viarum), and Witchweed
Number of Weed species seeds/plant Velvetleaf 1500 Yellow nutsedge 2400 Giant foxtail 2500 Pennsylvania smartweed 3000 Barnyardgrass 7000 Common ragweed 15,000 Jimsonweed 23,400 Shepherd's purse 38,500 Curly dock 40,000 Common purslane 52,000 Common lambsquarters 72,000 Stinkgrass 82,000 Redroot pigweed 117,000 Black nightshade 178,000 Russian thistle 200,000 Witchweed
500,000 Table 14-4 Effect of increasing weed densities on crop yields.
Regulation of witchweed
(Striga asiatica) conditioning and germination by dl-strigol.
Fabaceae) had the potential to control the stemborers Chilo partellus (Swinhoe) (Crambidae) and Busseolafusca (Fuller) (Noctuidae) on maize and suppress the witchweed
Striga hermonthica (Del.
GP-473 to GP-485, PI 641251 to PI 641266) with moderate levels of resistance to the parasitic witchweed
, Striga hermonthica (Del.
The research team has also been conducting experiments over the last six years to tackle another problem for African can increase farmers, the parasitical plant known as Striga or Witchweed
stimulants of witchweed
(Striga asiatica) from hydrophobic root exudate
Researchers at ICIPE developed a "push-pull" system: Grasses planted outside the cornfield attract the stemborer; a legume or grass planted within the cornfield repels the insect and also suppresses witchweed
by a factor of 40 compared to a corn monocrop--all while adding nitrogen to the soil and preventing erosion; and, finally, an introduced parasite radically reduces the stemborer population.
Citrus canker, gypsy moths, medflies, witchweed
, and exotic animal and poultry diseases all have constituency-based programs.