Final diagnosis


Xanthomonas cucurbitae

Small yellowish to gray spots (greasy at the start of the attack), angular, on a squash leaf. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)
Detail of the spots which tend to merge and necrose, especially at the edge of the leaf, where there is an accumulation of water. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)
<i><b>Xanthomonas cucurbitae</b></i> (<i>Xanthomonas campestris</i> pv. <i>cucurbitae</i>, bacterial spot) on squash 4
<i><b>Xanthomonas cucurbitae</b></i> (<i>Xanthomonas campestris</i> pv. <i>cucurbitae</i>, bacterial spot) on squash 8
<i><b>Xanthomonas cucurbitae</b></i> (<i>Xanthomonas campestris</i> pv. <i>cucurbitae</i>bacterial spot) on squash 3
Butternut squash from Provence partially covered with small gummy beige spots with more or less a brown border. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)
On ripe fruit, the spots, as at the start of the attack, are greasy and sometimes surrounded by an oily halo; the cuticle and the epidermis split open. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)
<i><b>Xanthomonas cucurbitae</b></i> (<i>Xanthomonas campestris</i> pv. <i>cucurbitae</i>, bacterial spot) on squash 7
<i><b>Xanthomonas cucurbitae</b></i> (<i>Xanthomonas campestris</i> pv. <i>cucurbitae</i>bacterial spot) on squash 2
Squash partially covered with small raised corky cracks, sometimes gummy. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)
Brown rot developing deep from a spot; the tissues are more or less lysed in places. <i> <b> Xanthomonas cucurbitae </b> </i> (<i> Xanthomonas campestris </i> pv. <i> cucurbitae </i>, bacterial gall, bacterial spot)