25.1 Bacterial canker; wilted plants; see also 18.1a-c Bacterial stem rot; petiole and leaf symptoms.
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1 25.1 Bacterial canker; wilted plants; see also 18.1a-c Bacterial stem rot; petiole and leaf symptoms.
2 25.4a Pith necrosis; plant, showing chlorosis and wilt. 25.4b Pith necrosis; brown lesion on stem, often with many adventitious roots.
3 25.4c Pith necrosis; discoloration and collapse of pith tissues Stem necrosis; stem lesion, internal discoloration.
4 25.6a Corky root; lesions on roots. 25.6b Corky root; corky lesion showing splits in surface tissue Damping-off; affected seedlings.
5 25.8 Didymella stem canker; lesion on stem near soil line. 25.9a Early blight; target spot leaf lesions; see also b Early blight (left) and septoria leaf spot (right); typical leaf symptoms.
6 25.10a Fusarium crown and root rot; basal stem canker b Fusarium crown and root rot; internal browning of lower stem.
7 25.10c Fusarium crown and root rot; fruit rot caused by Fusarium oxysporum f. sp. radicis-lycopersici d Fusarium crown and root rot; internal fruit rot a Fusarium wilt; wilted plant, showing chlorotic leaves.
8 25.11b Fusarium wilt; wilted plant c Fusarium wilt; brown vascular discoloration in stem.
9 25.12a Gray mold; stem canker with sporulating Botrytis cinerea b Gray mold; basal stem canker.
10 25.12c Gray mold; severely affected plants d Gray mold; ghost spots on a green fruit; see also 18.11b.
11 25.13a Late blight; leaf and fruit lesions b Late blight; fruit rot Leaf mold; lesions on underside of leaf.
12 25.15 Septoria blight; blighted tomato seedlings; see also a Verticillium wilt; leaf chlorosis and dieback.
13 25.16b Verticillium wilt; wilted tomato plant a Cucumber mosaic; severe shoestring symptom; leaf blade is reduced or absent; see also 18.18a b Cucumber mosaic; mosaic symptoms on leaf.
14 25.19a Double streak; brown streaks on stem infected by potato virus X and tomato mosaic virus b Double streak; dark lesions on fruit a Tomato mosaic; stunted growth and pale-colored foliage.
15 25.21b Tomato mosaic; mosaic symptoms on leaves; see also 18.18a c Tomato mosaic; infected plants (between tall, healthy ones) are stunted and have small, fern-like leaves d Tomato mosaic; internal and external symptoms on fruit.
16 25.21e Tomato mosaic; severely affected (right) and healthy fruit a Tomato spotted wilt; foliar chlorosis and necrosis.
17 25.22b Tomato spotted wilt; severe foliar symptoms (leaf bronzing) c Tomato spotted wilt; discoloration of ripening fruit d Tomato spotted wilt; blemished fruit of cultivar Jumbo.
18 25.23 Blossom-end rot; affected fruit a Magnesium deficiency; leaf symptoms; note upward cupping of margin.
19 25.24b Magnesium deficiency; severe symptoms; veins, margins remain green a Blotchy ripening; moderately severe symptoms; see also
20 25.25b Edema; blistered areas on underside of leaf c Edema; blisters on blossom-end of fruit d Edema; on ripe fruit.
21 25.25e Growth cracks; healthy and affected fruit Root-knot nematodes; southern (left) and northern (right); note larger galls on plant at left a Greenhouse whitefly; infested leaf.
22 25.27b Greenhouse whitefly; adult; length ± 1.5 mm c Greenhouse whitefly; eggs d Greenhouse whitefly; immature (nymphal and pupal) stages.
23 25.27e Greenhouse whitefly; pupae, parasitized by Encarsia formosa (black), non-parasitized (white) f Encarsia formosa, adult; a parasite of the greenhouse whitefly g Black sooty mold growing on honeydew produced by greenhouse whitefly.
24 25.28a Chrysanthemum leafminer; adults feeding, and egg-laying scars b Chrysanthemum leafminer; infested (mined) leaves.
25 25.28c Chrysanthemum leafminer; damaged tomato leaf d Chrysanthemum leafminer; adult fly; length ±2.5 mm e Braconid wasp; a leafminer parasite resting on a mined leaf; note leaf mine with frass (dark line).
26 25.29 Western flower thrips; adult; length 1-2 mm Two-spotted spider mite; summer phase (below), and its predator P. persimilis.
27 25.31 Tomato russet mite; leaf damage Brown blotch; yellow to brown discoloration of caps Mummy; mushrooms dwarfed with slightly curved stem, tilted cap, and mycelial overgrowth of swollen base.
14.7 Black swallowtail; mature larva with scent glands extended.
14.7 Black swallowtail; mature larva with scent glands extended. 15A.1a Bacterial blight; leaf lesions. 15A.1b Bacterial blight; pod lesions. 15A.2a Ascochyta leaf and pod spot; lesions on leaves and stem.
7.22b Celery stalkworm; larva; actual size 25 mm. 8.1a Bacterial leaf spot (peppery leaf spot); lesions on Brussels sprouts.
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Forage Pests Identification and Control By Mir M Seyedbagheri University of Idaho, Elmore Extension Alfalfa Caterpillar: Larvae are velvety, green caterpillars up to 38 mm long. They have a narrow, white