1st quiz AGR 305

In wheat crop, which of the following weeds act as host for causing black rust?

• Phalaris minor

• Avena fatua

• Agropyron repens

• Commelina spp

Which of the following weed is used for curing snake bite?

• Leucas aspera

• Calotropis procera

• Physallis minima

• Ageratum conyzoides

For controlling annual weeds through soil solarization, it is necessary to solarise the soil for

• 2-3 weeks

• 3-4 weeks

• 4-5 weeks

• 5-6 weeks

The weeds which were originally found in a place are

• Anthrophytes

• Apophytes

• Alien

• Local

Rumex acetosella is

• Acid soil weed

• Neutral soil weed

• Saline soil weed

• Basic soil weed

Striga lutea is

• Total root parasite weed

• Partial root parasite weed

• Total stem parasite weed

• Partial stem parasite weed

Herbicides which moves from the site of application to site of action are known as

• Contact herbicides

• Translocated herbicides

• Systemic herbicides

• Both b and c

The characteristic feature of grass weeds is

• Hollow stem

• Angular stem

• Broad leaves

• All of the above

Sleeping sickness is aggravated by which of the weeds

• Goat weed

• Brush weed

• Charali weed

• Prickly poppy

Lantana camara weed can be controlled biologically by

• Crosidosema spp

• Puccinia spp

• Panicum spp

• Marisa spp