2021
DOI: 10.1094/pdis-08-20-1769-pdn
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First Report of the Hop Cyst Nematode, Heterodera humuli, in Two Counties of the Yakima Valley Region, WA, U.S.A.

Abstract: Cyst nematodes are ranked as the second most damaging plant-parasitic nematode genus of crops worldwide (Jones et al. 2013). The hop cyst nematode, Heterodera humuli, has been reported to cause up to 38% reduction in dry hops per bine (Hay and Pethybridge 2003). America is the top hop producing country worldwide, with 75% of production occurring in Washington state, with the majority of this production occurring in the Yakima Valley region (USDA, 2019). In late 2019, 30 soil samples from 15 different fields we… Show more

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Cited by 3 publications
(4 citation statements)
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“…JOURNAL OF NEMATOLOGY the roots (Coolen and D'Herde, 1972) of hop plants. The plants were kept from a greenhouse, and the average temperature observed in the period was 24.0°C, with a maximum and minimum of 30.7 and 19.1°C, respectively.…”
Section: A B C D Ementioning
confidence: 99%
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“…JOURNAL OF NEMATOLOGY the roots (Coolen and D'Herde, 1972) of hop plants. The plants were kept from a greenhouse, and the average temperature observed in the period was 24.0°C, with a maximum and minimum of 30.7 and 19.1°C, respectively.…”
Section: A B C D Ementioning
confidence: 99%
“…The plants were kept from a greenhouse, and the average temperature observed in the period was 24.0°C, with a maximum and minimum of 30.7 and 19.1°C, respectively. After 90 days, the average total population recovered from the roots (Coolen and D'Herde, 1972) was 13,428 eggs and J2s, corresponding to a reproductive factor (RF) of 4.81 (Oostenbrink, 1966). Inoculated plants showed symptoms similar to those initially observed in the field, as yellowish leaves, reduced development, and a large number of galls on the roots, while uninoculated plants showed normal development, without root galls, confirming that the hops are host of M. incognita.…”
Section: A B C D Ementioning
confidence: 99%
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