Impact of Plant Viruses on Yield Loss Quiz

Curly top virus of sugar beets and swollen shoots of cacao

Qualitative rather than quantitative

Older plants usually resist the infection better than younger ones

<p>More than 1000</p> Signup and view all the answers

<p>Because they cause enormous yield losses in agriculturally important crops</p> Signup and view all the answers

<p>Examples include tobamovirus, tospoviruses, begomoviruses, cucumoviruses, ilarvirus, potyviruses, tungro virus, carlavirus, babuvirus, badnavirus, polerovirus, and allexivirus.</p> Signup and view all the answers

<p>Young plants are generally more vulnerable to virus infection because in case of early infection, they can suffer serious losses.</p> Signup and view all the answers

<p>Examples include Citrus tristeza virus (CTV), cacao swollen shoot virus (CSSV), banana bunchy top virus (BBTV), papaya ringspot virus (PRSV), wheat streak virus, and many others.</p> Signup and view all the answers

<p>Vegetatively propagated crops such as bananas, cassava, potatoes, citrus, grapevines, taro, sugarcane, and sweet potatoes are at a higher risk because they are severely infected with different groups of viruses, leading to significant yield losses.</p> Signup and view all the answers

<p>The yield losses due to plant viruses are estimated at more than US$30 billion annually.</p> Signup and view all the answers

<p>The effects of virus diseases on yield are difficult to quantify.</p> Signup and view all the answers

<p>Older plants usually resist virus infection better than younger plants.</p> Signup and view all the answers

<p>More than 1000 virus species that infect cultivated plants worldwide have been described.</p> Signup and view all the answers

<p>They cause enormous yield losses in agriculturally important crops.</p> Signup and view all the answers

<p>Curly top virus of sugar beets and swollen shoots of cacao.</p> Signup and view all the answers

<p>Use of virus-resistant transgenic varieties</p> Signup and view all the answers

<p>Annual and perennial crops are equally affected by plant viruses.</p> Signup and view all the answers

<p>Use of virus-resistant transgenic varieties</p> Signup and view all the answers

<p>The financial impact of plant viruses in agriculture is estimated to be more than $30 billion annually worldwide.</p> Signup and view all the answers

<p>Virus diseases are a concern for farmers, consumers, and manufacturers.</p> Signup and view all the answers