Predatory Coccinellids of Insect Pests of Assam Lemon (<I>Citrus limon</I> L. Burmf) in Jorhat District of Assam

Abstract

The diversity of predatory coccinellids of insect pest of Assam Lemon (&lt;em&gt;Citrus limon&lt;/em&gt; L. Burmf) was studied in the citrus orchard of Assam Agricultural University, Jorhat during 2015-2016. Twelve species of coccinellid beetles &lt;em&gt;viz&lt;/em&gt;., &lt;em&gt;Coccinella transversalis&lt;/em&gt; (Fabricius), &lt;em&gt;Coelophora bowringii&lt;/em&gt; (Crotch), &lt;em&gt;Coelophora saucia&lt;/em&gt; (Mulsant), &lt;em&gt;Cryptogonus bimaculatus&lt;/em&gt; (Kapur), &lt;em&gt;Cryptogonus&lt;/em&gt; spp., &lt;em&gt;Cryptolaemus montrouzieri&lt;/em&gt; (Mulsant), &lt;em&gt;Harmonia conglobata&lt;/em&gt; (Linnaeus), &lt;em&gt;Harmonia dimidiata&lt;/em&gt; (Fabricius), &lt;em&gt;Illeis confusa&lt;/em&gt; (Timberlake), &lt;em&gt;Propylea&lt;/em&gt; spp., &lt;em&gt;Platynaspis kapuri&lt;/em&gt; (Chakraborty and Biswas) and Scymnus spp. were recorded feeding on various sucking pests. Among the coccinellids, &lt;em&gt;Coccinella transversalis&lt;/em&gt; and &lt;em&gt;Harmonia dimidiata&lt;/em&gt; were recorded in maximum number (9.0 and 8.4 per tree respectively) with a relative abundance of 17.79 and 16.60 per cent respectively while &lt;em&gt;Cryptogonus&lt;/em&gt; spp. was recorded lowest (0.9 per plant with relative abundance of 01.79 per cent).

Diversity study of aphids and associated predatory fauna occurred in major Kharif and Rabi crop ecosystems of Akola, Maharashtra, India

“…in kharif agro-ecosystem at Akola. The present observations on coccinellids are in accordance with the (Ramya and Thangjum 2016) [24] , who recorded C. sexmaculata and C. transversalis along with other species in citurs ecosystems. The earlier worker (Basappa 2011) [5] reported three coccinellids predators and nine spiders in sunflower ecosystems whereas, (Naikwadi et al 2015) [23] had also reported the coccinellids and spiders in sunflower ecosystem of Akola district support the present findings.…”