Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Exploring Herbicides Used to Control Invasive Weeds Herbicide Classification Herbicide Classification Many Schemes Degree of response among plants: • selective controls some species in presence of others • non-selective controls all species Herbicide Classification Method of application: • foliar applied • soil applied • broadcast entire area • spot restricted area • band Herbicide Classification Based upon use: • Pre-plant incorporated (PPI) Mechanically incorporated before sowing crop o Prevent photodecomposition, volatility o Place herbicide where can be absorbed by sensitive seedling tissues • Pre-emergence Applied to soil surface before weed seedling germination and emergence • Post-emergence Applied to foliage of emerged weeds Herbicide Classification Length of soil persistence: • persistent injure follow crop normal rotation • residual injure/kill germinating weeds short time o 1 growing season or less • long residual control several growing seasons Herbicide Classification Chemistry/herbicide family: • inorganics • organics Herbicide Classification Organics: • phenoxy-, benzoic-, pyridine-, quinolinecarboxylic acids • sulfonylureas, imidazolinones, triazolopyrimidine • triazines, substituted ureas, uracils • thiocarbamates, halogenated acids • dinitroanilines, carbamates, phosphoric amides • aryloxyphenoxypropionates, cyclohexanediones • nitrodiphenyl ethers • those with no particular family Herbicide Classification Plant related characteristics: • systemic translocates throughout plant • contact no translocation • mode/mechanism of action Herbicide Classification Mode/mechanism of action: • amino acid biosynthesis inhibitors: Escort, Amber, Plateau, Roundup • auxin-like/growth regulators Tordon, Milestone, 2,4-D, Vanquish/Clarity • Light activated: photosynthetic inhibitors o Velpar, Karmex, Krovar, Spike Pigment synthesis inhibitors o Callisto (mesotrione) Cell membrane disruptors Herbicide Classification Mode/mechanism of action: • cell division inhibitors Treflan, Prowl • lipid biosynthesis inhibitors (cell membranes) Poast, Fusilade