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Effects of Heterodera Goettingiana On Weight of Foliage of Pea Plants in Pots

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For more content, see Nematology.

The effect of Heterodera goettingiana Liebscher on the weight of pea (Pisum sativum L.) haulms was studied in pots in a screenhouse during 4½ months. Clay pots containing 500 g of steam sterilized sandy loam each with five pea plants were inoculated with a logarithmic series of cyst densities. The relation between weight of tops and initial nematode density according to the equation y = m + (1-m)zP-T showed within the conditions of the experiment a tolerance limit of the pea plants to H. goettingiana of about 4.4 eggs per g of soil. The maximum rate of multiplication occurred at the smaller initial population densities. The yield of tops from uninfested plants was not statistically different from that of pots containing egg densities smaller than the tolerance level.

Affiliations: 1: Laboratorio di Nematologia agraria del C.N.R., Bari, Italy


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