Meloidogyne enterolobii

Guava (Psidium guajava L.) is an important fruit crop and good source of income for Indian farmers. It’s infested with some major pests including plant parasitic nematodes. The number of plant parasitic nematode species associated with guava but some species are cause great losses. The accurate identification of nematode species is a basic key of successful management. Soil and plant samples collected from fields of guava from Arathwara village, Sheoganjtehsil, Sirohi district of Rajasthan, India on the GPS location 250 03’40.7”N; 720 58’05.0”E.

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Guava orchards of Uttarakhand were facing sudden decline and tested root samples revealed the incidence of root knot nematode. The nematode infested plant manifested a drastic reduction in plant growth, absence of fine roots, a poorly developed root system, and a decline in yield quality and quantity. Severely infested plant shows small leaves, leaf browning, leaf drop, growth inhibition whereas roots are distorted by small and large multiple galls leading to sudden death of tree.

5p nguathienthan4 18-04-2020 14 0   Download

Root knot nematodes (Meloidogyne spp.) are the most common and destructive plant parasitic nematode group with wide host range of crops, including guava (Psidium guajava L.). Meloidogyne enterolobii (Syn:M. mayaguensis), the root knot nematode of the guava tree, belongs to the group of tropical root knot nematodes and is considered as one of the most damaging species, due to its wide host range, pathogenicity and ability to develop and reproduce on several crops carrying resistance genes.

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Root knot nematode Meloidogyne enterolobii cause considerable yield losses in guava. It is now an emerging menace in guava production. Many authors reported the resistant nature of Psidium cattleianum against M. enterolobii. P. cattleianum is a small tree or shrub with a smooth bark and leaves are obovate elliptic and glabrous. Fruits are round, having good aroma with sweet taste. The fruits of Psidium gujava are big in size, round, smooth skin, white or pink flesh, soft, firm, light yellow, pleasant flavor with few seeds. Mechanisms of resistance against M.

6p nguathienthan2 26-12-2019 6 0   Download