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Maclean et al. - 2002 - Rice almanac source book for the most important e

Maclean et al. - 2002 - Rice almanac source book for the most important e

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Wolf spiders feed on a range of insect pests.<br />

Spiders are especi<strong>al</strong>ly numerous and diverse<br />

partners in rice fields. In South and Sou<strong>the</strong>ast<br />

Asia, at least 340 species are known from rice<br />

lands. Parasitoids are gener<strong>al</strong>ly more hostspecific<br />

than predators. Although parasitoids are<br />

easy to overlook, <strong>the</strong>ir effect on pests can be<br />

extremely <strong>important</strong>. Parasitoids lay <strong>the</strong>ir eggs<br />

in, on, or near <strong>the</strong> host. When <strong>the</strong> egg hatches<br />

and <strong>the</strong> young parasitoid develops, <strong>the</strong> host<br />

eventu<strong>al</strong>ly stops feeding and dies. Various pathogenic<br />

microorganisms (fungi, bacteria, and<br />

viruses) infect and kill insect pests of rice. O<strong>the</strong>r<br />

species of fungi and bacteria attack weeds or are<br />

<strong>important</strong> in <strong>the</strong> biologic<strong>al</strong> control of rice<br />

diseases.<br />

The rice plant and its ecology 29

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