Occurrence and cross infectivity of granulovirus of field bean pod borer <i><span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:#666666;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Adisura atkinsoni</span></i><span style="font-size:14.0pt;line-height:115%;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";color:#666666;mso-ansi-language:EN-IN; mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN"> Moore</span>

Abstract

<span style="font-size:14.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:#666666;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">A granulovirus (GV) was isolated from the field- bean pod borer, <i>Adisura atkinsoni</i>. Electron microscopic observation showed capsule or granular shaped occlusion bodies. The virus was highly virulent against second instar larvae when tested at 1x10⁶ occlusions/larva through food surface (pod/seed) contamination technique. The incubation period ranged from 6-10 days in the case of second instar larvae. In contrast to green coloured healthy larvae, GV in fected A. <i>atkinsoni </i>became brownish/pale white in colour mostly due to accumulation of large number of occlusion bodies. Study on the cross infectivity of A. atkinsoni GV to gram caterpillar, <i>Helicoverpa </i> armigera revealed the high susceptibility of <i>H</i>. <i>armigera</i> to A.atkinsoni GV. thereby,widening the scope of controlling both the species on the same cropping system. This is the first record of GV from A. atkinsoni from India.</span>