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In parts of yard, overwintering bees and other beneficial insects live in dormant plant material. But aphids, beetles lurk in veggie plot. Aphids and other bad bugs can survive cold in veggie garden.
Woolly aphids generally are not much cause for alarm, although they can cause rather unsightly damage to plants, which is particularly a problem for growers of ornamental plants. Symptoms caused by their feeding on a plant include twisted and curled leaves, yellowed foliage, poor plant growth, low plant vigor, and branch dieback.
In a study on tomatoes, it was shown that the aphids preferred smooth to hairy leaves and that susceptible tomato plants had higher sucrose, lower quinic acid and higher alanine and tyrosine levels. [10] In lettuce, butterhead varieties are mostly moderately to highly resistant to the aphid whereas crisphead varieties are susceptible. [11]
The removal of sap creates a lack of vigor in the plant, and aphid saliva is toxic to plants. Aphids frequently transmit plant viruses to their hosts, such as to potatoes, cereals, sugarbeets, and citrus plants. [29] There are two types of virus transmission between plant-aphid interactions: non-circulative transmission and circulative ...
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Aphids do best when amino acids are actively translocated in the phloem. In spring, the leaves grow and import amino acids via the phloem; in summer leaves are mature and export mainly sugars. In autumn, the leaves senesce and export amino acids and other nutrients. Thus on trees the leaves are most suitable for aphids in spring and autumn.
repels tomato hornworm and cabbage worms [2] Castor bean: repels moles [3] Catnip: repels ants, flea beetles, aphids, the Japanese beetle, squash bugs, weevils, [2] the Colorado potato beetle, the cabbage looper, [3] and cockroaches. [4] May attract cats. Chamomile: repels flying insects [4] Chives: repels carrot fly, Japanese beetle, [2] and ...
Other common names include blackfly, bean aphid, and beet leaf aphid. [2] In the warmer months of the year, it is found in large numbers on the undersides of leaves and on the growing tips of host plants, including various agricultural crops and many wild and ornamental plants. Both winged and wingless forms exist, and at this time of year ...
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