weed interference in horticulture crops

Stephen Meyers (Test 2)

weeds?

Establishing Thresholds

what is the level of weeds allowed

at what point in weed interference do results end in greater eonomic loss than the cost of treating the problem

varies with weed species, weed location, …

something elese here

rectangular hyperbola yield loss model

Yl = (ID)/[1+(ID/A)]

I is crop tolerance to yield (competitive ability)

D is weed density

A = yield loss as D approaches infinity

yL is predicted yield loss

every 1% of light intercepted by weed results in ____% reduction in yield

1%

higher yielding cultivars typically ___________ under weed pressure

lose more yield (they have more yield to lose)