A survey was conducted from sugarcane fields at four completely different sampling sites like Paithan, Aurangabad, Phulambri and Khultabad taluka. During May-2016 -April-2017. To study the nematodes diversity and their correlation with the soil parameters soil samples was collected from the sugarcane root zones from the four completely different sugarcane fields. The Nematodes were extracted from collected soil samples by the Baermann's funnel technique. And also prepared the soil samples for testing the different soil parameters in the laboratory like Temperature, Moisture content, Water holding capacity, pH and electrical conductivity of the soil. The Nematodes were identified up to Generic level and the numbers of nematodes per 150grams of soil were determined. From all fields, eleven genera of nematodes were collected the collected nematodes belongs to the genus, Iotonchus, Dorylaimus, Dorylaimoides, Indodorylaimus, Xiphinema, Eudorylaimus, Axonchium, Longidorus, Hemicycliophora, Monhystera and Hoplolaimus. Among these, the seven genera were found from Paithan taluka which belongs to Dorylaimus, Dorylaimoides, Iotonchus, Xiphinema, Eudorylaimus, Hoplolaimus and Indodorylaimus. In Phulambri and Khultabad taluka also have same genera, however, in Aurangabad, another generas was additionally recorded i.e. Axonchium, Longidorus, Hemicycliophora and Monhystera. In this study co relationship between plant-parasitic nematodes and soil physicochemical parameters of sugarcane soil. Is carried out and also studied the effect of soil parameters on the nematode diversity. The details are discussed in the text.

In central India the major cause of citrus decline is supposed to be because of Phytophthora causing diseases in citrus. The pathogen attack citrus plants right from nursery causing damping off of seedlings, decay of fibrous roots, crown rot, collar rot, foot rot and gummosis in mature orchards. Nagpur mandarins face short life span and low productivity because of these three species of Phytophthora viz. P. parasitica, P. citrophthora and P. palmivora. An intensive rapid roving survey of selected mandarin orchards was conducted during the year 2016 and 2017 to access incidence and intensity of Phytophthora diseases (root rot and gummosis). Total 83 orchards were surveyed during peak period of diseases (August to November) by using modified disease rating scale (0-9). According to rapid roving survey of root rot in selected orchards, pooled data indicate similar disease progress with root rot incidence in the range of 10.42 to 62.50% and intensity from 1.62 up to 23.48%. In case of gummosis pooled data indicate similar trend of disease development with gummosis incidence in the range of 14.58 to 64.58% and intensity in between 2.08 to 19.91%.